The Remove Selected Filter option will let you remove filters from your reports. This way, you'll get to select the important details that matters to you most. I'm here to guide you how.
Go to Reports menu.
Open any report you want (e.g. Transaction List by Customer).
Select the Customize Report button.
Choose the Filters tab.
In the Current Filter Choices section, select the category you want to remove.
Click the Remove Selected Filter button.
I've attached a screenshot below for your reference.
Once done, you can memorize the report to save the current customization and make it available for future use. For the detailed steps, kindly refer to this article: Create, access and modify memorized reports. It also contains other related articles such as Understand reports and Set report preferences.
Please let me know if you have other concerns. I'm just around to help.