I was hoping someone else would add this.
A pencil or ballpoint pen inserted into the pantograph of a front derailleur will hold it out against the spring, making it easier to pull the slack out when attaching a cable. Folks who use this technique often know which pen or pencil is just right and can quickly hit the right tension every time.
BTW- if you work on Campy fronts and switch bodies, the pen in pantograph makes it easier.
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