So, how about an even easier way to copy from the Command Prompt (and a secret way to easily paste)?Just right-click on the Command Prompt title bar and select Properties.
On the Options tab, in the Edit Options section, check the QuickEdit Mode box and then select OK.Enabling QuickEdit Mode is like having Mark enabled all the time, so selecting text to copy is really easy.
As a bonus, this also enables a simple way to paste into the Command Prompt: just right click once and whatever you have in the clipboard is pasted in the Command Prompt window.
Normally, pasting involves right-clicking and selecting Paste, so this is still a bit different than you're used to.