Position Manager
The Position Manager maintains a list of file or disk offsets and corresponding descriptions, called positions, which can serve as annotations/bookmarks. It is also used for search hits when not working with a case, but much less powerful than a search hit list. Navigating from one entry to the next is easy if you press Ctrl+Left and Ctrl+Right. You may enter new positions and edit or delete existing entries. If a special offset in a file is important to you, you may add it to the Position Manager. This makes it a lot easier to find it again later, and you do not have to remember it. Descriptions may be up to 8192 characters in size. An appropriate description for instance could be "Data chunk begins here!". Optionally all positions maintained by the Position Manager can be highlighted in the editor window in a unique color you specify, and their descriptions displayed in yellow tooltip windows when the mouse cursor is moved over them. You may also add or edit positions with the context menu of an edit window or by clicking the middle mouse button in an edit window.
Click the right mouse button in order to see a context menu in the Position Manager. The context menu provides additional commands. You may delete, load or save positions, even export the list as HTML. If the position list in the general Position Manager was changed, it is saved in the file WinHex.pos when exiting WinHex, so that they are still available in the next session. Only search hits are not permanently saved, unless they have been edited via the context menu.
There is the general Position Manager, which stores positions that are applied to all data windows, and there is the a Position Manager for each evidence object in a case, which stores positions that were defined for that particular evidence object and that are applied only to that evidence object's data window. The former is invoked through the main menu (Navigation | Position Manager), the latter by clicking the right-most button in the middle of the screen when an evidence object is open, with crosshairs on it. That may explain it if you cannot find the positions that you have defined previously. Near the top of the data window it says which Position Manager you are currently looking at if the Position Manager is active.
Search hits in the general Position Manager are by default deleted as soon as the general Position Manager is closed, to avoid confusion as positions in the general Position Manager have no reference to a particular file or disk and are intentionally applied to whatever data source is active when invoked. If you wish to keep search hits, please change the corresponding option in the general Position Manager's context menu.
A complete documentation of the POS file format is available from the WinHex Homepage http://www.x-ways.net/winhex/.