The demonstrative pronouns point out objects.
*Yon (thon) indicates something that is further away in space or time than that or thae.
Thir's guid neeps.
These are good turnips.
Thae's bonnie weans.
Those are pretty children.
Yon's a muckle tree.
That's a big tree over there.
That'll dae fine.
That will do nicely.
Thon wis grand times.
Those were great days - long ago.
This is a braw day.
This is a beautiful day.
This dug's awfu frichtsome.
This dog is very fearful.
That hoose is gey an braw.
That house is very nice.
Yon ben is happit wi snaw.
That mountain over there is covered in snow.
Thir fowk canna thole the cauld an thae fowk disna like the sun.
These people can't bear the cold and those people don't like the sun.
In Mid Northern and North Northern Scots this and that are used as plurals rather than thir and thae.
This hooses is aucht the laird.
These houses belong to the landowner.
That tuips is awfu veecious.
Those rams are terribly vicious.