click on beginning of a fragment, which you want to select
hold down left mouse button and move the pointer to the end of the fragment
put the cursor in beginning of a fragment, which you want to select
holding the Shift key move cursor to the end of a chosen fragment using arrow keys
double-click on any white space, which you want to select
triple click on any paragraph place, which you want to select
click on green square above the column, which you want to select