Sorry if this has been asked before but I could not find a previously asked question which appeared to be the same.
I have 'lost' the 'transform' panel where the dimensions of a mesh object can be changed. Well its still there but everytime I restart Blender I have to 'drag' it out only to have it 'disappear' the next time O start Blender. Also I thought that there was a shortcut key (T?) which would make it reappear which doesn't seem to work (and I tried shift T, Ctrl T as well as other keyboard keys. I also looked in the manual and in Youtube.
Here is an image with the transform panel displayed after I 'dragged' it out.