The Servers tab ships with 29 columns, which is more than fits on most screens. Use the column settings dialog to hide the ones you do not need, reorder the rest, and set the width and alignment of each.
Right-click any column header on the Servers tab and choose Column settings.... A modal dialog opens with a list of every available column.


Changes apply to the tab in real time, so you can see the effect immediately.
The first column on the tab (the server name) is the main column. It cannot be hidden and cannot be moved out of first position. Other columns have no such restriction.
Click OK to keep your changes. Click Cancel to revert to the column layout that was in place when you opened the dialog. Layout changes are saved with the program's settings and survive restarts.
The same column settings dialog is used for the User sessions and Processes tabs. Layouts are stored separately for each tab. The Application log tab has a fixed set of four columns (Time, Level, Category, Message) and does not use this dialog.