I have a lot of block with just 1 or 2 orb so how can I combined them using coin control?
Thanks.
Click on the small triangle before the square check box to "unfold" the inputs that are in one address so you can see the value of the inputs themselves, then start clicking the check box in front of inputs until you have checked at least as much as you like to send/combine, then you click "OK" to bring you back to the "Send" page and you fill in the address (may be the same address as where you are sending from) and the amount you like to send. It will calculate the fee (should be 0 if no more than 10 inputs are used) and you can send the amount, which will then get combined into one new input (plus another input for the "remainder" if you did not send as much as you selected).
Hope this clarifies!
Edit: if you are sending to your own wallet, you see the input and can re-select it for a next transfer before there is even one confirmation,
since your wallet knows everything about the transfer that still needs to be put in the block chain.
Do not try to select the input for a next transaction, because that will confuse the wallet and you will need to repair it, so only select inputs that already have some "confirmations" for a transaction.