I’ll assume you’re a newer player.
All of the options from the 'i’nventory screen have been added in a sense just recently. For quicker use of things, you can easily go with the old shortcuts, such as -
"w"ield
"W"ear
’'t"hrow
"T"ake off (clothing)
etc., I haven’t played Cata in a while, but you get the idea.
This speeds up things quickly, though not leaving the inventory screen might also be a needed option, since more actions will probably get added in the game.