I am using InDesign CC and I had all my margin lines and bleed lines visible when I was inserting images and text onto the pages. I think I accidentally pressed a wrong shortcut that had all the lines disappear and the pasteboard color changed to a lighter gray. It seems like it is some type of presentation mode when I was clicking shift + w. I closed the document and opened it back up again but the same thing is still there. I am not sure how to have all the margin lines and bleed lines reappear. I need help to fix it asap!
I attached a picture below of how my screen looks like right now.
The shortcut Peter's giving you toggles between Normal and Preview Screen Modes.
You can also change this by choosing View > Screen Mode and selecting one of the screen modes available.
The Preview Screen mode hides all the guides and pasteboard from your document and allows you to still work on the document, for example edit text etc. which is something you can't do in Presentation Mode.