You cannot change the anchor point.
To get the line 100 pixels from the left, type in 100 plus half of the width of the object.
Holy cow.... this is ridicioulus
This means, exact positioning of multiple objects ends up with a pocket calculator and rounding values up and down.
Thnaks anyway , Ann
Use Photoshop instead.
Or just make your first title as you want it and save it as a template. Then use that template for all other titles.
Use the Transform options for X position, Y position, Width and Height for your template.
Yes, there will be many ways around... but all of them are not very comfortable.
How about creating a "positioning title " saved as a template. eg. a positioned rectangle in a title.
Use that and delete the rectangle object. (and use New Title based on)