You can tip others using your stored CATs but you have to firstly add some to your cat.tip account. This can be done with a transfer from your account to @cat.tips account. You can do it through Steemworld.org, steemengine or any other tokens wallet manager.
Once you have some balance you can tip others by simply adding “! CATtip” plus the number of CATs you wanna tip. Take a look on how I did it to you!
You’ll receive a notification comment in a bit of minutes and after all a confirmation comment, both from @cat.tips account.

Take care to not edit your comment as you’ll be tipping again!

To see your current balances, type this in any comment: “?CATbalance and @catnet will show you all CAT related balances. Notice that it’s not related with @banjo’s CAT balance you may have.
Hope this helps you. If you have any other question come and ask on Caturday discord server 😉