The block.topPosition parameter may be used to query the first column of the first element in the block selection. If there is no block selection, block.topPosition will return zero.
query command
Global.
query block.topPosition
query block.topPosition
block command
query command
block.bottomElement parameter
block.bottomPosition parameter
block.inView parameter
block.text parameter
block.topElement parameter
block.type parameter
blockMarkAll action
blockMarkBottom action
blockMarkDown action
blockMarkEnd action
blockMarkHome action
blockMarkLeft action
blockMarkNextWord action
blockMarkPageDown action
blockMarkPageLeft action
blockMarkPageRight action
blockMarkPageUp action
blockMarkPrevWord action
blockMarkRight action
blockMarkToMouse action
blockMarkTop action
blockMarkUp action
blockMarkWord action
blockMarkWordAtMouse action