Is there a way to move only a portion of a multiple-count item to/from storage?

Here's the specific scenario : I have a freighter with 4K + cargo space avail. I want to fill up with Electron Orbs to use for warp fuel. A full cargo hold gives me over 1000 orbs. I then want to visit a station in each of several star systems, and stash about 200 orbs at each station to be used during missions into and from each system.

My problem ( to which I am hoping I just missed an answer ) is that when I dock at my first 'stash point' , my only option seems to be to put ALL of my orbs in storage. I really only want to move 200 into storage.

Could there be a slider added (similar to moving items to market) - or does one already exists and I just missed it?
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Later edit :
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I found it. What a 'doh' moment :) For anyone else looking ...

As per what is almost industry standard with game inventories, <shift> and <ctrl> keys modify the amounts moved -

<shift> & LMB will move HALF of the total amount
<ctrl> & LMB will move a single item
<any others I missed?>

Now, with creating a couple extra containers, and a little manipulating, I can do what I wanted.

There are also a way to move specific amount. I am not at my PC, so you have to check it yoursel (what a help am I, right :))

Modifier with right or left click will bring small dialog window with slider to move exact number of items. I am sure you will find it.