You can simply type the values in as an expression like [633.5,716]
You can type values into an expression like this [635.5, 716]
A word of caution on your position values. I noticed that you X value is on a half pixel. If your footage is an even number of pixels wide then you've just reinterpreted every pixel in the shot and softened the image. Try and keep things lined up with the pixel grid. Generally your composition and your footage should always be an even number of pixels high and wide. You cannot use MPEG compression like h.264 with an odd number of pixels because of the compression algorithm requirements.
I do not understand your answer.
By entering the value direct then the value isn't locked, ?? I still mistakenly come to change it.
What I seek is the ability to lock the values of the individual Transform settings
Anchor point - "Lock/unlock"
Postiton - "Lock/unlock"
Scal - "Lock/unlock"
Rotate - "Lock/unlock"
Opacity - "Lock/unlock"
You have to add an expression to lock a layer in place, not just type in values to the property. If you do not know how to use expressions then please read up on them. There is no lock unlock feature that only works on transform properties. Masks can be locked, but that is about all unless you want to lock the entire layer. Here's what the expression would look like:
With values entered in to an expression you cannot change the position of the layer effective locking it into place. Any keyframes applied to the layer will have no effect because expressions override keyframes. Keyframes can use keyframe data, but if you type in a simple position array that's all that will be used.