Can I make my own bookmarks?

Yes, you can create and save your favorite selections as bookmarks using the bookmark button in the top toolbar.  

See: https://help.qlik.com/en-US/sense/June2018/Subsystems/Hub/Content/Bookmarks/create-bookmark.htm 

Can I filter on dimensions that are not shown in a filter box or chart?

Filtering can be made on any dimension shown on any sheet in the report. Filtering will impact all sheets. It’s also possible to access additional dimensions not shown in any chart by opening the Selection Tool (the symbol is an arrow point into a box with dotted lines, located in the upper right corner, just above the Unifaun logo). 

See: https://help.qlik.com/en-US/sense/June2018/Subsystems/Hub/Content/Selections/use-selection-tool.htm 

Can I do a search across the full data set?

Yes, use the Smart search feature by clicking on the magnifying glass in the upper right corner, just above the Unifaun logo. Type any text to search across the full data set. 

See: https://help.qlik.com/en-US/sense/June2018/Subsystems/Hub/Content/Search/use-smart-search-tool.htm 

What is a drill-down dimension?

A drill-down dimension is made up of several linked dimensions. When a selection is made on the first dimension, the available instances of the next dimensions are automatically shown.  

Example: The drill-down type is made up of Mode – Carrier – Service. With no selection made, the modes of the data are shown (i.e. Road, Air, Sea). If a specific mode is selected, the carries in with the selected mode will be shown (i.e DSV, DHL, Schenker).