Good grief. I’m trying to write a philology essay and I’m having some problems trying to represent PIE. I can use superscript to distinguish the laryngeals and to add labial articulations, but does anyone have any idea how I might do syllabic consonants, or palatal consonants, or mark long vowels???
I suggest getting the Gentium font if you don’t already have it (from here), since it has all the symbols you need (as far as I can tell) and looks very nice (when printed at least), e.g. ḱ ṛ ē.
For entering them most word processors have an “insert symbol” command which lets you choose any character from a font, or in Windows, you can use the Character Map program. As a last resort you can find out the unicode number for each character and enter them using that.
Also, Gentium (and lots of other fonts) already have super- and subscript versions of numbers which usually look nicer than doing it with the program, e.g. gʷʰ, h?.
Hope that helps.