SMPTE color bars – Click for your own test pattern kit

This page is for posters to test comments prior to submitting them to WUWT. Your tests will be deleted in a while, though especially interesting tests, examples, hints, and cool stuff will remain for quite a while longer.

Some things that don’t seem to work any more, or perhaps never did, are kept in Ric Werme’s Guide to WUWT.

Formatting in comments

WordPress does not provide much documentation for the HTML formatting permitted in comments. There are only a few commands that are useful, and a few more that are pretty much useless.

A typical HTML formatting command has the general form of <name>text to be formatted</name>. A common mistake is to forget the end command. Until WordPress gets a preview function, we have to live with it.

N.B. WordPress handles some formatting very differently than web browsers do. A post of mine shows these and less useful commands in action at WUWT.

N.B. You may notice that the underline command, <u>, is missing. WordPress seems to suppress for almost all users, so I’m not including it here. Feel free to try it, don’t expect it to work.

Name Sample Result
b (bold) This is <b>bold</b> text This is bold text
Command strong also does bolding.
i (italics) This is <i>italicized</i> text This is italicized text
Command em (emphasize) also does italics.
a (anchor) See <a href=http://wermenh.com>My home page</a> See My home page
A URL by itself (with a space on either side) is often adequate in WordPress. It will make a link to that URL and display the URL, e.g. See http://wermenh.com.

Some source on the web is presenting anchor commands with other parameters beyond href, e.g. rel=nofollow. In general, use just href=url and don’t forget the text to display to the reader.

blockquote (indent text) My text

<blockquote>quoted text</blockquote>

More of my text

My text

quoted text

More of my text

Quoted text can be many paragraphs long.

WordPress italicizes quoted text (and the <i> command enters normal text).

strike This is <strike>text with strike</strike> This is text with strike
pre (“preformatted” – use for monospace display) <pre>These lines are bracketed<br>with &lt;pre> and &lt;/pre>
These lines are bracketed

with <pre> and </pre>
Preformatted text, generally done right. Use it when you have a table or something else that will look best in monospace. Each space is displayed, something that <code> (next) doesn’t do.
code (use for monospace display) <code>Wordpress handles this very differently</code> WordPress handles this very differently
See http://wattsupwiththat.com/resources/#comment-65319 to see what this really does.

Youtube videos

Using the URL for a YouTube video creates a link like any other URL. However, WordPress accepts the HTML for “embedded” videos. From the YouTube page after the video finishes, click on the “embed” button and it will suggest HTML like:

<iframe width="560" height="315"


        frameborder="0" allowfullscreen>


WordPress will convert this into an internal square bracket command, changing the URL and ignoring the dimension. You can use this command yourself, and use its options for dimensions. WordPress converts the above into something like:

[youtube https://www.youtube.com/watch?v=yaBNjTtCxd4&w=640&h=480]

Use this form and change the w and h options to suit your interests.

Images in comments

If WordPress thinks a URL refers to an image, it will display the image

instead of creating a link to it. The following rules may be a bit excessive,

but they should work:

  1. The URL must end with .jpg, .gif, or .png. (Maybe others.)
  2. The URL must be the only thing on the line.
  3. This means you don’t use <img>, which WordPress ignores and displays nothing.
  4. This means WordPress controls the image size.
  5. <iframe> doesn’t work either, it just displays a link to the image.

If you have an image whose URL doesn’t end with the right kind of prefix, there may be two options if the url includes attributes, i.e. if it has a question mark followed by attribute=value pairs separated by ampersands.

Often the attributes just provide information to the server about the source of the URL. In that case, you may be able to just delete everything from the question mark to the end.

For some URLs, e.g. many from FaceBook, the attributes provide lookup information to the server and it can’t be deleted. Most servers don’t bother to check for unfamiliar attributes, so try appending “&xxx=foo.jpg”. This will give you a URL with one of the extensions WordPress will accept.

WordPress will usually scale images to fit the horizontal space available for text. One place it doesn’t is in blockquoted text, there it seems to display fullsize and large images overwrite the rightside nav bar text.

Special characters in comments

Those of us who remember acceptance of ASCII-68 (a specification released in 1968) are often not clever enough to figure out all the nuances of today’s international character sets. Besides, most keyboards lack the keys for those characters, and that’s the real problem. Even if you use a non-ASCII but useful character like ° (as in 23°C) some optical character recognition software or cut and paste operation is likely to change it to 23oC or worse, 230C.

Nevertheless, there are very useful characters that are most reliably entered as HTML character entities:

Type this To get Notes
&amp; & Ampersand
&lt; < Less than sign

Left angle bracket

&bull; Bullet
&deg; ° Degree (Use with C and F, but not K (kelvins))








Superscripts (use 8304, 185, 178-179, 8308-8313 for superscript digits 0-9)




Subscripts (use 8320-8329 for subscript digits 0-9)
&pound; £ British pound
&ntilde; ñ For La Niña & El Niño
&micro; µ Mu, micro
&plusmn; ± Plus or minus
&times; × Times
&divide; ÷ Divide
&ne; Not equals
&nbsp; Like a space, with no special processing (i.e. word wrapping or multiple space discarding)
&gt; > Greater than sign

Right angle bracket

Generally not needed

Various operating systems and applications have mechanisms to let you directly enter character codes. For example, on Microsoft Windows, holding down ALT and typing 248 on the numeric keypad may generate the degree symbol. I may extend the table above to include these some day, but the character entity names are easier to remember, so I recommend them.

Latex markup

WordPress supports Latex. To use it, do something like:

$latex P = e\sigma AT^{4}$     (Stefan-Boltzmann's law)

$latex \mathscr{L}\{f(t)\}=F(s)$

to produce

P = e\sigma AT^{4}     (Stefan-Boltzmann’s law)


Linking to past comments

Each comment has a URL that links to the start of that comment. This is usually the best way to refer to comment a different post. The URL is “hidden” under the timestamp for that comment. While details vary with operating system and browser, the best way to copy it is to right click on the time stamp near the start of the comment, choose “Copy link location” from the pop-up menu, and paste it into the comment you’re writing. You should see something like http://wattsupwiththat.com/2013/07/15/central-park-in-ushcnv2-5-october-2012-magically-becomes-cooler-in-july-in-the-dust-bowl-years/#comment-1364445.

The “#<label>” at the end of the URL tells a browser where to start the page view. It reads the page from the Web, searches for the label and starts the page view there. As noted above, WordPress will create a link for you, you don’t need to add an <a> command around it.

One way to avoid the moderation queue.

Several keywords doom your comment to the moderation queue. One word, “Anthony,” is caught so that people trying to send a note to Anthony will be intercepted and Anthony should see the message pretty quickly.

If you enter Anthony as An<u>th</u>ony, it appears to not be caught,

so apparently the comparison uses the name with the HTML within it and

sees a mismatch.

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Gunga Din
July 8, 2022 3:18 pm


Gunga Din
Reply to  Gunga Din
July 8, 2022 3:19 pm


Gunga Din
July 8, 2022 4:00 pm
Last edited 2 months ago by Gunga Din
Gunga Din
July 8, 2022 4:03 pm
July 27, 2022 9:21 am

Post without a photo.

Last edited 2 months ago by Ric Werme
July 27, 2022 9:22 am

foo – no can delete!

Last edited 2 months ago by Ric Werme
August 6, 2022 6:08 am

Quoted paragraphs:

It may help to remember that before their higher education climate scientists were school kids probably inculcated with the view that fossil-fuel use is unnatural and therefore bad. Opposing it therefore probably makes many of them feel virtuous. This is unfortunate. To paraphrase Hoosier poet Max Ehrmann, we’re children of the universe; no less than the trees and the stars, we have a right to be here. 

Humans are no less a part of nature than the calcareous organisms that over the eons removed so much carbon from the cycle of life that during the last glaciation plant life came perilously close to carbon-dioxide starvation. So instead of seeing humans’ fossil-fuel use as unnatural perhaps we should look upon it as nature’s way of restoring the state that supported evolution of most complex life, including our primate ancestors.

For many of us laymen the climate question boils down to whether the (speculative) benefit to future generations justifies the (more-certain) cost of avoiding emissions today. Again, even a 5°C increase by the end of the century is estimated to delay gross-world-product growth by only three years.

Rest of the story

Last edited 2 months ago by jhborn
August 11, 2022 7:16 am

T_f = frac{m_1 T_1 + m_2 T_2}{m_1 + m_2}

August 11, 2022 7:16 am

T_f = \frac{m_1 T_1 + m_2 T_2}{m_1 + m_2}

Beta Blocker
August 29, 2022 8:21 am

comment image

August 31, 2022 9:51 pm

woo hoo

September 1, 2022 6:46 pm

I’m looking for a retired electrical engineer who is interested in working with me on a new/old technology project that addresses the electricity curtailment and flared natural gas problems.
Ideally someone with strong industrial scale electrical device development experience. Experience with physics/chemistry a plus.

Janice Moore
September 2, 2022 10:55 am
Last edited 1 month ago by Janice Moore
Janice Moore
September 2, 2022 10:57 am
Last edited 1 month ago by Janice Moore
Janice Moore
September 2, 2022 10:58 am

Last edited 1 month ago by Janice Moore
September 2, 2022 4:51 pm

Test comment

Martin C
Reply to  Eric Worrall
September 6, 2022 9:12 pm

Eric or Mods, an odd thing has happened with commenting.  It occurs both in Edge and Firefox.   As of an article on August 23 (the article about 600,000 workers required for the green transition, there now is an odd ‘field’ that appears to be info on formatting text.   Articles prior to that don’t have this, but they also now don’t show the ability to ‘reply’ to a comment.  
I have attached (or tried to attach) screen shots of what it shows in Edge, in the ‘before’ and ‘after conditions.  In Firefox, each little ‘block’ seen in edge huge (i will try to attach a screen shot in a little bit); but wanted to point out this oddity.   

WUWT comment before.png
Martin C
Reply to  Martin C
September 6, 2022 9:13 pm

Well, it looks like just the ‘before’ is there, so will try to post the ‘after’ picture

WUWT comment AFTER .png
Martin C
Reply to  Martin C
September 6, 2022 9:22 pm

And one thing i forgot to mention, is that when clicking to ‘reply’ to someone, that odd ‘box’ shows up below the area that comments are being entered – see the screen shot of when i was typing this comment (replying to my previous one).  

Posting a comment.png
September 5, 2022 8:11 pm

September 10, 2022 7:30 pm

sqrt(&sum;((x<sub>i</sub> – x<sub>m</sub>)<sup>2</sup>…(x<sub>n</sub> – x<sub>m</sub)<sup>2</sub) / n-1

Last edited 26 days ago by James Schrumpf
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