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The tools menu covers all application specific commands and actions, which will offer you most of the settings you can change dynamically. These are the tools menu entries:

Menu "Tools" File Info

Cursor movement and tracking

When you move the mouse pointer over the viewer window a blue vertical line will be displayed as a cursor that tracks your mouse movement within the histogram. Sometimes you may find that bothering ... so a ⌘ D will hide the cursor or make it re-appear. To mark an interesting position as permanent in the histogram use ⌘ LeftClick to freeze the cursor at its current position. Press again to unlock the cursor. You can approximately move the cursor one second, one minute or ten minutes left or right off from its current position. Use LeftClick or RightClick on the right hand current time display to step one second, ⌘ LeftClick or ⌘ RightClick to step one minute and ⌘ ⌥ LeftClick or ⌘ ⌥ RightClick to step ten minutes away. Exactness of movement depends on the current scale/zoom of the view and the TV system of the file. You can easier step an exact second in a PAL file than on NTSC.

Scaling of the viewer window

The standard display scale can show a maximum of something more than 10,000 kbps. You may have DV files which much more than that or MPEG4 or HEVC files that have much less than even 2,000 kbps. To scale such a file properly, activate the auto-scaling feature with ⌘ A, and it will be done so (as long as scaling is not locked to be fixed with ⌘ E). If auto-scaling is active you will notice, that the preview window will also adapt to the current needed scale while reading a file.

GOP information

During frame count estimation the first GOP (Group of Pictures) and the last GOP of a file is read if found and analyzed. On MPEG files a re-ordering of B-frames will occur to get the correct playback sequence of all frames. Frame re-ordering and the position of the individual frame PTS are important facts to calculate an accurate frame count. You can display the status of these two GOP's by by selecting the Show File Info command. The status displayed will show both GOP's if available and their associated flags (open GOP by 'o', closed GOP by 'c' and a 'b' beneath for a broken link or a dash in the normal case when the link is not broken). The frame letters ('I', 'P' or 'B') shown are in raw decoding order of the file being analyzed. Never found but also detected are D-frames. If you see a '0' in the frame string then the frame header did not specify a frame type. A '?' in this list is the result of a crashed frame header. Frames with a value of '0' or '?' will not be counted as proper frames.
You can copy this text displayed to the clipboard if needed. Just press the RightClick within the text subwindow and select the clipboard function from context menu.
For more information about frame headers and frame re-ordering please refer to the ISO/IEC MPEG specification.

Multi-zoom mode

You can zoom a marked area within the viewer window several times down to a single sample depth view. Mark a zoomable area within any calculation method by RightClicking and dragging and activate to zoom to this area by a RightClick into the marked area. The zoom feature is a very powerful instrument, so you find more detailed information herehere.