In general you select the object then  change the hole diameter attribute in the right hand panel but you need to define what sort of hole and in what Editor you are working. It will help you to build a dummy project and work through the Tutorial to learn the tools before you start on a serious project, as advised in: [https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a](https://easyeda.com/forum/topic/How-to-ask-for-help-and-get-an-answer-71b17a40d15442349eaecbfae083e46a)

@andyfierman Thank you. The attributes were hidden behind the Layers and Objects box. Problem solved.