SOLIDWORKS 2018 has added a number of improvements to the visual aspect of the Treehouse application (Start > SOLIDWORKS Tools 2018 > SOLIDWORKS Treehouse 2018). When you have an assembly opened in Treehouse, this is a great visual tool of the assembly structure.
Treehouse 2018 – Zoom
There is now a Zoom to Area tool to focus on a region.
You can also now double-click the middle mouse button to zoom to fit.
Treehouse 2018 – Hide Suppressed Documents
Previous versions of Treehouse would only show suppressed components with a dashed line around the tile
Now the 2018 Treehouse options allow you to hide any suppressed components.
Treehouse 2018 – Print Options
Selecting the Print flyout menu, you can now select to print the overall extents or the area displayed/zoomed. Print Preview is also added based on selection, paper size, scale, and orientation.