Navigate to the table that you would like to customize (i.e. Maps, Variables, Map Tasks, etc.).

Click on the gear icon on the column you want to modify. 

Select the columns you want to add to the table. 

You can move columns by dragging and dropping them in the position that you want. 

Sorting is as simple as clicking on the column name. 

Click into a Map to adjust the Map Task table. 

Once inside a Map, you have the ability to group columns. Select the gear icon. 

Select "Group ascending" or "Group descending". 

From there you can collapse or expand groups. 

And don't forget "Bulk Actions" still works within groupings. 

For "Bulk Actions" select the applicable tasks, then select your action. 

Modifying Custom Tables