I can't work out how to insert web links or images so that they will be read by the Web exporter to produce XHTML. What is the "key" referred to in the cheat sheet, and how do I define a key?

A key is a string that you can define yourself. Using this key, you can refer to the Note of your Notepad that contains the actual link or image. Let me give you an example for links. For instance, you want to include a link to http://www.the-soulmen.com in your text. First off, you need an Inline Style to include your link in. By default, such an Inline Style should already exist (it has the start tag "[[" and the end tag "]]"). If it doesn't, you can always create such an Inline Style in the Ulysses Preferences.
In the Web Export, you can now set the Action for the "Link" Inline Style to "Link" in the last column. When you open the Cheat Sheet now, you see that the Expected Text Format for Link is "[[key-description]]" and the Expected Note Format is "[[key-link]]". The key for the text and the note have to be the same, so that the Web Export can connect the two. To include your link in the text, you need to do two things:
1. In the text, you need to adhere to the expected text format. Thus, you need a key (i.e., a string which you can choose yourself; in this case you could for example use "soulmen") and a description for the link, e.g. "The Soulmen". Therefore, your sentence could look like that: "Ulysses is a text editor by [[soulmen-The Soulmen]]."
2. In the Notepad, create a new Note. Inside this note, you need to adhere to the expected note format, and since the URL we're linking to is http://www.the-soulmen.com, the content of the note needs to look like "[[soulmen-http://www.the-soulmen.com]]".

As the Cheat Sheet states, this will be exported as (don't be confused by "&lt;", there should be an < at that point)
Ulysses is a text editor by <a href="http://www.the-soulmen.com">The Soulmen</a>.

You need the key to differentiate between multiple links in your text. Additionally, using keys allows you to refer to one link (or image, reference, footnote, ...) more than once in the text.

I need H3 headings in web export. Can I create an H3 category?

H3 headings are included in the Modern and the ePub Templates. However, you can also add H3 headings to the other (or your custom) Templates, the Web Export has a chapter on that ("Creating Custom Templates", see the section "The Preset Property Lists").

Just checking: is Ulysses still in development? I hope so ...

Yes, definitely! For the Web Export, we're currently working on an Editor that makes editing Templates and Presets a hundred times easier.

Hello,

I tried using the links feature. It does work for one link. How can I add more links to the notes? I got the error message that the tag was not found.

Example:
**************************************************************
"Ulysses is a text editor by [[soulmen-The Soulmen]]."
[[soulmen-Hari bol!]]
**************************************************************
[[soulmen2-http://www.google.com]]
[[soulmen-http://www.the-soulmen.com]]
**************************************************************

With Love,
Uddhava d?sa

Thanks goetz, got it.

I guess there is a similar process for images, but there is no way to preview them in the editor. It gets a little tricky,
because adding images usually requires WYSIWYG environment.

Adding only text and trying to visualize how a document will look with the image seems quite complicated.
Is there any cool way of doing it with Ulysses?

With Love,
Uddhava d?sa