On a transaction (Estimate) with over 25 line items there is a drop down at the top right of the sublist for you to choose which group of 25 you want to see. It also has the option for ALL. Does anyone know if you can set this to default to ALL or increase the number of items in this sublist. I've been through the "Set Preferences" and nothing there is that low.

Outside of customisation, not that I am aware of, the preference setting "Number of rows in list segments" does not change this I think (it doesn't on invoices anyway) but you can try it, Oracle likely enforce this for page optimisation load times. Next best option is to create a saved search with filters on and use that as your sublist view; use that to isolate data rather than wading through a lot of pagination.