How to: Hide objects from the master.
Solution:
Select the 'Omit Background Graphics from Master' check box, in the 'Custom Background' dialog box.
1) Select the 'Format' menu and select 'Custom Background...'. (The Custom Background dialog box appears.)
2) Select the 'Omit Background Graphics from Master' check box.
Select the check box
3) Do one of the following:
a) Click 'Apply to All', to apply the changes to all the slides in the presentation.
b) Click 'Apply', to apply the changes to only the current slide.
c) Click 'Cancel', to cancel the changes.