You can change the order of columns, hide columns from the tutors' view and select which are frozen (frozen columns are grey and always appear on the left when you scroll to the right).
Go to the Full Grade Centre, then click Manage and then Column Organisation:
Change the order by dragging the rows with your mouse. Anything above the grey bar is a frozen column.
You can also hide columns from the tutors' view of the Grade Centre. Select rows as required, then select Show/Hide, Hide Selected Column.
Make sure you Submit the changes.
Note that hiding columns in this way does not hide them from the student view. Follow the guidance in the Return Marks to Students section if you need to hide a column from students.
You can see various options for individual columns if you click the column's action link:
From this link (depending on the type of column) you can:
There may also be options to view/mark the assessment.