We have to be more careful when doing this. For the first time I have changed the font size of menu by mistake instead of font. First create your own scheme by going to File-->Settings-->Colors & Fonts and then you can make changes to your own scheme. The final procedure is to go to settings(File-->Settings) and then select Editor and Colors & Fontsin the left bar menu. Then select the arrow on the left side of Colors & Fonts and then select Font in the left menu bar. You will get options to change your values. Remember you can only change values to your own sheme.

设置(Ctrl+Alt+s)——>外观——>覆盖默认字体(不推荐):

然后将大小更改为16+。

永久更改UI元素的默认字体大小

进入设置(Mac上的“首选项”)>外观和行为>外观。勾选“覆盖默认字体(不推荐)”复选框。然后改变字体大小，点击确定

简单的方法 按双Shift键，然后输入increase—>点击增加字体大小，然后你的编辑器改变字体

WINDOWS用户:文件——>设置——>编辑器——>字体。

MacBook用户:

更改字体大小:

Select **Android Studio** menu (which is present next to Apple icon)-->Preferences--->Editor-->Font-->Size(give size)-->ok

在编辑器中放大和缩小:

Select **Android Studio** menu -->Editor-->General-->change font size (zoom) with command and mouse wheel-->ok