I've been using this all along though I don't think you're really understanding the question, but I'll try to simplify it. If I had over a stack of items in the ME system and I wanted to bulk craft over a stack of items, I wouldn't be able to do it very fast since I can only craft a stack at a time. I'd like to be able to craft a whole inventory at a time, since that would be way quicker. Is there any way I can do this? Sorry if I confuse you, I'm not really good at asking questions and making them clear
I don't think there's a key combination that will make the Crafting Terminal craft more than one stack of items at a time. However, if all of the ingredients of your crafting recipe are in ME storage (in ME chests, ME drives, or in normal chests with storage busses attached), the Crafting Terminal will automatically repopulate the crafting grid with items in storage. So, if you shove your thousands of essences into the network, you should be able to spam-shiftclick in the crafting terminal and fill your inventory pretty quickly.
If that's still not fast enough (and/or you get tired of putting the recipes in the crafting grid all the time), you can make use of AE's very powerful autocrafting system. First, you'll need at least one Crafting CPU multiblock: to start off, you can just craft up a single Crafting Storage block (of any tier) and place it somewhere in your network. More complicated autocrafting chains will need more powerful crafting CPUs; if you find that your existing CPU is insufficient (i.e. if you ask AE to craft something and it refuses), you can upgrade your CPU by adding on more Crafting Storage blocks. Do note that the multiblock must be a solid cuboid of crafting storages and similar blocks- no gaps, holes, indentations, or things poking out the sides. Adding Co-Processor blocks will allow the CPU to handle multiple steps in the
same crafting chain at once; if you ever want to do multiple independent crafting requests at the same time, you'll need two
totally separate and unconnected crafting CPU multiblocks.
Once you've got your crafting CPU set up, you'll need to tell AE exactly how to craft whatever it is that you want to craft. To do this, you'll need a Molecular Assembler and an ME Interface. Place them down next to each other somewhere in your network. Then, using a Pattern Terminal, configure a Blank Pattern so that it stores the recipe that you want to teach the ME system (note that if the Pattern Terminal is in Crafting mode, the output will appear as soon as you fill in the recipe) and place it in one of the slots at the bottom of the Interface's GUI. Voila: Whenever you want some of that particular item, but there's none stored in your ME system, your ME terminals will display the word "Craft" in place of the quantity. Click on the item, and it'll pop up a GUI asking how many you want. Enter a number, click OK, and it'll open another GUI showing what all the system would need to do to craft those items and whether or not you have any sufficiently powerful crafting CPUs. Click OK again, and the system will craft the items for you, as well as any necessary ingredients that you've also taught it how to craft.