Avoid using regular tape on your walls
Posters and prints are very practical decor items to spruce up a room. If you are renting and are not allowed to make any permanent changes, then these provisional decorations are the only ones you can use to fill up empty walls. Just keep this tip in mind: do not stick them on with regular tape, since it can lift off the paint or discolor it.
Luckily, there are other kinds of tapes with special adhesives that can be used safely on walls. These will be easy to remove and will not take the paint with them or discolor your walls. You will also appreciate having used a special adhesive whenever you decide to move since you will be able to remove your posters in no time.