I'm pretty sure you cant batch replace with capitals.
Depending on how many need capitalizing, you've got two options.
Loop through each lowercase letter and replace with it's capital
Search 'a' -> Replace 'A'
Search 'b' -> Replace 'B'
etc. (match case)
Copy all the text into a text editor of your choice, select a section that you want capitalized and in menus/toolbar 'Change to UPPERCASE'.
(Will only work if your editor has that ability)
Depending on how much you want changed and a couple of other factors, the Search/Replace will probably be easier, if not monotonous.