When requesting an item in the requester chest, you can set both a minimum and a maximum value. The default values are one stack size for the minimum and inf. for the maximum. When grabbing either of the two sliders, they also move in increments of one stack size. But you also have the option to ove...

The blueprint parameterisation dialog gives you a tooltip to see where a value is used in your blueprint. When you have a requester chest in your blueprint and set a request to 123 iron plates, that tooltip will say "Request 123x[item=iron-plate] in [item=requester-chest]" . This is useful...