To readjust the door frame you have to remove the trim along the latch side to get at the shims.
Gap on latch side of door.
How to fix a gap in an outside door.
You could remove the door trim on the catch side and see if you can figure a way to move the jamb over closer to the door.
Sometimes the gap is far too wide.
If you have gaps around an outside door you could be losing up to 15 percent of the money you spend heating your home by allowing heated air to blow outside.
As the hinge leaves bind on the nail set they will spread slightly which will push the door over and close the gap on the latch side.
If i need to shrink a gap on the hinge side i pull the hinge pin in the offending area and gently bend the barrels of the jamb leaf slightly toward the jamb with a small adjustable wrench.
A properly installed door features a 1 8 inch gap along the latch side to allow the door to swing and function correctly.
If the gap on your door exceeds this.
This may be due to the fact that the hinges were inset too far into the door and or frame.
Reducing door gap in a latch side.
This job can be a hassle especially if you have painted trim.
Other than replacing the entire door frame and door it will be difficult to make a satisfactory repair.
Gap along the latch side about the thickness of two quarters coins.
If this is the case it is a good bet that this is part of the reason for the excessive gap on the door latch side.