To setup Operation Theatre type and Categories go to Setup > Operation Theatre, here first we should add Operation Theatre Category then add Type.

Operation Theater Category 

To add Operation Category click on + Add Category button now enter Operation Category and click on Save button.

You can check added Operation Category record at Operation Category List page.

To edit Operation Category click on edit and to delete Operation Category click on delete icon present at Action column.

Operation

To add Operation click on + Add Operation button now enter Operation Name and Category then click on Save button.

You can check added Operation record at Operation List page.

To edit Operation click on edit and to delete Operation click on delete icon present at Action column.