It’s often hard to find suitable places to tie a temporary indoor banner. An “X” pole will keep it taught and allow it to be leaned against a wall or chairs. Poles made of 3/4″ PVC pipe are easily fabricated and may be joined by short scraps of 1″ PVC pipe as shown elsewhere on this site (see below).
Here’s a sketch:X-Support-for-Banner
Hooks made from coat hanger wire insert into the open ends of the pole and secure the top corners of the banner. The weight of the banner tends to splay the “X”, drawing the top edge of the banner tight. Further tensioning can be accomplished by securing the lower corners of the banner with bungee cords. This whole assembly may be leaned against a wall or lashed to chairs with additional bungee cords.
Here’s the article on pole fabrication: