Macro to add text to the front of a label

Question

Hello, 
 I would like to create a macro that does the following: 
 label
up arrow (jumps to the front of the text)
LTC:
enter 
 This will allow me to append LTC to the front of my timecode cues. However, when learning this macro, the up arrow is not recorded. 
 Does this mean that changing a label via macro is only possible by clearing the whole text? If so, that means I would lose the existing information in the label field

solar · Answer

Hopefully not two years too late but I needed this myself recently. It's not possible to do it with a macro but you can do it with a Command targeted object on a magic sheet. 
 Syntax is as follows: 
 local:/eos/key/label◆
local:/eos/key/page_up◆
local:/eos/key/-◆
◆
◆
◆ 
 I was adding a - prefix, but if you want more characters you'll need to have one /key line per character.