Q:

how to paste text to left of original text like ultraedit column mode

I have below original text:
a:1
b:2
c:3
d:4

I want to paste below content into right side of original text area
a:5
b:7
e:10

Result should be:
a:1   a:5
b:2   b:7
c:3   e:10
d:4

it is easy to finish it by ultraedit columnn mode.  but how to do in sublime quickly?     

A:

You can use column selection. 
Go to the end of first line, and press ctrl+shift+down (or ctrl+alt+down on Windows and Linux) as many times as you need.  Then add the number of spaces that you need, and paste your text.