Problem with GW Instek GDS-1102B Digital Oscilloscope

[sbdada]

Hello,
Today I got my first oscilloscope. It's a GW Instek GDS-1102B. According to the specification, it has a 10MPts memory depth. But, when I turned it on, the upper right corner of the screen shows only 10Kpts of memory depth. Unfortunately I've almost zero knowledge about digital storage oscilloscope, so I don't know how to fix it.
So, is there any way or option in the settings to increase the memory depth or did I got the wrong product?
Please help me. Thanks in advance.

[wraper]

Press "Aquire" button, set record length. There is nothing to fix, you don't want to use 10 Mpts unless you really need it.

[sbdada]

That's cool, I got it. Another question which i forgot to mention on my main post, sorry for that. It has 5 button's which just do nothing. Pressing those says, "Not supported for this model!". Those buttons are "Option", "Search", "Set/Clear", "Left arrow" and "Right Arrow". This looks odd to me. If this is not supported, then why they added these buttons?
Anyway, thank you Mr. wraper