Kile gives you the ability to make your own tags. A tag is similar
to a shortcut that launches some command or writes frequently-used text.
For example, Joe Sixpack uses often the sentences I prefer \LaTeX\
to \TeX\ and What would I do without Linux®?.
To create user-defined tags to write these sentences, he would access
→ → ; this will present him a dialog where he can create
his own user-defined tags.

The Edit User Tags Dialog

Invoking a User Defined Tag
He would probably give each tag a name that can clearly identify it. The name you give your tag
is entered in the section marked Menu item, and the text of frequently-used command
should be entered into the section labeled Value. Once the commands are entered,
he can use them quickly using the shortcut Ctrl+Shift+1 for
the first tag to enter I prefer \LaTeX\ to \TeX\ and Ctrl+Shift+2 to enter What would I do without Linux®?.
There are some placeholders you can use in user-defined tags:
they are %B, %C, %M and
%S.
%B: will be replaced by a bullet.%C: this is where the cursor will be placed after the insertion of a user-defined tag.%M: this stands for marked text; the selected text is inserted in its place when inserting user-defined tags.%S: will be replaced by the source file's name without file extension.
Let's consider the example you can see in the screenshots. First, we select a number in our text, let's say 2.
Now we press Ctrl+Shift+1 or choose → → , and we obtain \frac{2}{} with the cursor begin located within the second
pair of brackets.