Can I Increase Size of Intellij User Interface for my High Resolution Screen?

I just installed Intellij IDEA for the first time and would like to begin using it, but I have a high resolution laptop with a relatively small screen (1900 x 1080; 11.6"). As a result, the Intelij gui is so small when the program starts that it is almost unreadable. It causes so much eyestrain that I cannot even look at it long enough to navigate through the menus and see if I can figure out how to change it. Would someone be kind enough to tell me if there is a way for me to make things bigger so I can use this program comfortably, and if so, how?

Help would be very much appreciated!

Edit: I have been through the appearance menu, but I don't see a way to increase the size of the opening menu or toolbar icons.