Use the block.topPosition parameter 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.anythingSelected parameter
block.bottomElement parameter
block.bottomPosition parameter
block.elementText parameter
block.inView parameter
block.text parameter
block.topElement parameter
block.type parameter
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