After an image has been loaded, the Raw Sector Viewer can be activated by selecting the "Raw Sectors" item from ListBox, and clicking on the Details button above:
The individual sector can be selected by entering the desired number in the text fields in the upper left hand corner, or using the arrow keys on the control there. Track number is shown for reference, as is the byte size of the sector being viewed.
At the bottom of the dialogue is the contents of the sector, first shown in hexidecimal byte values, and then in ASCII/Shift-Jis form (depending on the configuration settings) The buttons in the upper right can be used to save the sector to a file (the exact sector contents are written, no header) or to Exit back to the main program. Below those buttons is the string search feature:
The feature accepts an (ASCII) text string input and then scans the disk data (but not metadata) for all matches. Each match can be tabbed through via the Result selection below.
Although the Raw Sector viewer does not allow the user to alter/write data back to the disk directly, it can be used to edit the disk image directly, via a hex editor like HxD:
Some floppy images (NFD and FDD in particular) allow for the storage of "emulation" related data, which is to say, metadata which handles things such as unexpected read returns. Some floppy disks used such things as methods of copy protection. Besides being flagged in the Details section during loading, the details are also visible from the Raw Sector Viewer:
When some Emulation data is present, you can click on the label itself for further details:
In this example, what we have are additional read operations for this sector, at different sector sizes. The results of these reads are stored as data embedded with the regular sectors (but are not currently directly viewable via Raw Sector Viewer)