On the standard tool bar there is a Preview button.

I have just noticed, however, that if i am looking at a record in Browse mode, and click the Preview button to see what it would look like printed, i get taken to another record instead of the one i was browsing.

If i click on the Exit Preview, i am taken back to the correct record again, strange behavior or is there a setting to fix this?

That preview mode is to show you the "print-preview" of the records being browsed so that will always return to the first page of the founds set.

you could use a script trigger on the layout exit/enter and or it is better to create a custom menu to change the default behavior of the preview mode. running your own custom script.

Perhaps grabbing the current record ID either going to a self join related record or a find request to isolate the current record in a new window ending in preview mode.

Thanks for the reply,

Is it possible to add a Custom button to the menu to replace the New Record/Delete Record menu item set as standard?

You can use the same custom menus options to change the menu items they also will change the Toolbar buttons you could make it say New Customer vs New Record and have it run a script with your logic vs of just creating a new record.