Zooming editor window android studio
When i update the android studio to the latest version now 2.0 the font changed and became bigger.
the provided solutions allow a change of font size just for the current page (opened page) if you want to change your entire font size of android studio you have to do this :
go to Settings>Editor>Colors&Fonts>Font
then click on "save as" and create a new profile name it "my profile" for example
and finally you can put the font of that profile, i put 12 so it was the previous version
In Preferences > Editor, there's an option "Change font size (Zoom) with Command+Mouse Wheel". (I'm on MacOS; on other platforms it might be control+mouse wheel).
You can also go into Preferences > Keymap > Editor Actions > Decrease Font Size/Increase Font Size/Reset Font Size and bind some keys to those commands.
IntelliJ and Android Studio have decent built-in search for finding application functions. In the preferences dialog, you can just start typing to do search (you can just start typing from a lot of places in the UI to begin a search); there's also a search box.
There's a key binding for searching actions by name; on MacOS it's command-shift-A. That's a super-handy feature.
Modify the settings of the android studio as shown below
Step 1: Open Android Studio and Go to File
Step 2: Open Settings
Step 3: Click on Editor
Step 4: Click General
Step 5: Check Change font size (Zoom) with Ctrl+Mouse Wheel (as shown in below snapshot)