adjustable revealing title

hi
I'm trying to make a title where one live is reveled between 2 shapes moving from the center out
the problem is , that line length is changing accordingly
so how to have a " on screen control " in final cut so I can align the to shapes to the start and the end of that text

Welcome Feisal to fcp.co

short answer: publish a layout of your design, for me its hard to imagine what exactly you like to accomplish. With some 'scribble' we save a 1000 words... and some helpful soul will support you …

long answer: best description how OSC works and created in this 3 part article from honorable board member fox
www.fcp.co/final-cut-pro/tutorials/1835-...ro-x-revealed-part-1
after reading and understanding and testing, within less than a month you'll find out yourself