Hi I must have ticked a box somewhere on my power point display but any changes I'm making to the Masterslide won't show up on the others and I need to amend them  a.s.a.p!  I've tried help and looking in almost everywhere! Can anyone give me any suggestions as to what I might have done?  Many thanks in advance

Display the slide in normal view.
On the Format menu, click Slide Layout.
Point to the type of layout the slide uses, such as Text or Text and Content (the name of the layout appears in ToolTips when you point), then click the arrow, and click Reapply Layout.

Hope this helps.

If u make changes press
file
save