Tumblr now has a WYSIWYG (What You See Is What You Get) editor with the 'B' button meaning bold. Simply select the text you wish to make bold (or un-bold) and click the 'B' button.
.gifs and you make them on photoshop. The ones on the internet are too big for Tumblr.
The blue underlined things that... takes you somewhere else called hyperlinks. This should help you out in asking for help.
If you go to Tumblr's home page, it has a form for you to fill out to make an account with Tumblr.
Yes it is absolutely legal and free to use.
You can use the Whisper App to make facts on Tumblr.
Get tumblr savior, that way you can blacklist the things you don't want to see.
The easiest way to get followers on Tumblr is simply to post frequently. Make sure you tag your posts with relevant tags so people can find them while they look at other things.
You can make words on Gmail underlined. You can do that by underlining shortcut. The shortcut for it is Control and U.
titles
Sign up for a new account make one and get on Tumblr.
You can get a program on your computer that allows you to change all sorts of things on your tumblr dashboard. I think it's something like 'greasemonkey' although I haven't used it in a while.
with a camera.