In Qlikview there was the input box object that let us set a variable. Currently Qlik Sense doesn’t have a native object so here is a really basic extension that does the same thing.

The selection is made when the save button is hit after entry.

http://branch.qlik.com/projects/showthread.php?622-Input-Box-which-updates-a-Variable-in-Qlik-Sense&highlight=input+box