You will see a box headed: Drag the slider to quickly select a desired amount.. At the right you will see the maximum number of points eligible to transfer. This will be rounded down to the next thousand. For example, if your balance is 100,111 it would show 100,000 because transfers must be made in increments of 1,000. However, it it shows 90,000 you would know that 10,000 are not transferable.