These questions and answers have been culled from some of the talk pages of the various editing-related Help: pages. If you see a useful answer there or anywhere else, please add it here.
==Editing==
===Q: How do I sign the content I edit?===
Three consecutive tildes (<tt><nowiki>~~~</nowiki></tt>) will insert a link to your user page. Four (<tt><nowiki>~~~~</nowiki></tt>) will insert that link and the save time and date. Five (<tt><nowiki>~~~~~</nowiki></tt>) insert just the time and date.
===Q: Can I link to a specific section header if there are multiple section headers of the same name? If so, how?===
A: Yes, you can. Each section header, regardless of size or depth, has a number corresponding to how many times that header's name has already appeared on the page. The number is "1" for the very first instance, "2" for the next, "3" for the next, and so on. You can link to each header just like a normal header, but using that number after the header's name (i.e. if there are three headers named "Foo," then the first can be linked to like so: <nowiki>[[#Foo 1]], the second. [[#Foo 2]], and the third, [[#Foo 3]]</nowiki>). Using the number "1" for the first header is generally superfluous, as the software will automatically link to the first header without using the number (i.e. <nowiki>[[Foo]]</nowiki>). If you don't want the number to show, then you have to use a piped link (e.g. <nowiki>[[Foo 2|Foo]]</nowiki>).
If you don't know how many times a given header has already appeared on a page (and thus the number to use), there are two ways to find out.
#Use the table of contents.
#:If a table of contents appears on the page, click on the header whom you wish to link to. The page will jump to that header. Now, look at the [[Uniform Resource Locator|URL]]. At the end, it will show the ID of the header in question. An example of a URL who has just been linked to a header, whose name has already appeared twice (and so is the third instance), and whose name is "Foo:"
#::<tt><nowiki>http://meta.wikimedia.org/wiki/Example_article#Foo_3</nowiki></tt>
#:The header link at the end of the URL shows that to link to this header, you would use <nowiki>[[#Foo 3]]</nowiki>.
#Look at the source.
#:While looking at the source, first find the section you're looking for, and then look at its ID tags. It will show the number in that tag. An example for a header, whose name has already appeared once (and so is the second instance), and whose name is "Foo:"
#::<tt><nowiki><p><a name="Foo_2" id="Foo_2"></a></p></nowiki></tt>
#::<tt><nowiki><h3>Foo</h3></nowiki></tt>
#:The ID and name tags (the ones that say "a name=" and "id=") show that this header can be linked to with <nowiki>[[#Foo 2]]</nowiki>.
===Q: How do I upload and make available PDF files?===
PDF files may uploaded and made available using the "File upload wizard" and "Embedded Image" button if they are image data as opposed to textual data, for example: [[Image:ExamplePDFPlotAsImage.pdf]]
In the case of PDF files this does not actually embed the image, as you can see above, but rather gives a link to the uploaded PDF image.
If your PDF file does not consist primarily of image data, please use standard Wikipedia textual input instead.
==Miscellaneous==
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