If you prefer not to use the Directory tree, you can collapse it by LMB-click on the right hand edge of it (again over the stack of tiny squares) and dragging to the left until it disappears. A confirmation dialog will open to confirm the removal of the folder ( which will also removes its contents as well!!). The column to the right of the folder names with the 'X' icon over it will allow the user to remove entire directories from the tree by simply selecting a folder and pressing the 'X' icon up top. To the left of each folder name there is a small triangle, LMB+clicking it will expand/collapse any sub folder within it and clicking the folders themselves will select them with a highlight and display their contents in the main browsing window. For instance, in the case of the Materials folder (shown above), there are a number of sub folders that organize the Material Presets by finish. Once the Directory Tree is opened there will be a list of folder names organizing the associated Presets. If it's not there you can make it visible by LMB-click dragging on inside edge of the left side of the viewport, (over the tiny row of stacked squares) you'll know you're on the correct spot when the cursor changes to a small arrow. One is the Directories tree, the left most column in the above image. Depending on your amount of screen real estate there are several methods for browsing the folders associated with Presets. The Preset Browser uses a familiar tree structure of nested folders for organization and navigation. Once properly installed MODO will automatically see the Preset content, and it should look something like this.
It can be found in the users account on The Foundry community website where the MODO installer was obtained, found under Step 2 'Download and Install Content'.
It should be noted that due to the large file size, the included Preset library that ships with MODO is a separate download and installation. Presets can be applied to the scene using a simple drag and drop operation or in some cases double clicking the Preset in the browser. It can also be opened as a popup palette by pressing 'F6' in any layout workspace. The Preset Browser is found in several of the layout workspaces, most predominantly in the 'Layout' workspace. The Presets come organized and categorized for quick visual browsing. Users can also easily create their own 'Presets' and add them to the browser or download shared assets from the Foundry community website for streamlined application to their own scenes. The 'Preset Browser' is a visual reference to a library of predefined objects, surfaces and settings that are included with MODO.