Here is a shot of a old service bridge I found

Sure,,,Add a memory card and in your menu there is a setting to turn on the record button,  then just press mark like your marking a location with gps and it will record your screen...your very first screen with up and down buttons (I think) will cycle you thru your saved screens.  Welcome to side imaging 

Thanks, Michael.  I have several SD cards lying around.
Jim, I figured out how to record and playback the side imaging on the sonar unit while I'm in the boat, but is there a way to do it on my pc at home?  I've read something about an xtf viewer, but haven't been able to figure out how to use it.  I don't have a cable or anything to connect my 797 to the pc.  I used the SD card to update my software, as well as get a few screenshots; just can't figure out how to view the recording.  Lowrance has a program so that I could view my sonar recordings, but side imaging is a different animal...
I'll try to insert a pic that shows a gill net with what I take to be several fish near the end of it.  The net is a line to the right of the fish, that extends at a slight angle to my course.  I motored along side the net; one of my early shots.  Can you or Michael tell me what I might need to do to enhance the resolution, etc.

I bought the PC kit for mine but I dont have much use for it. It might be because my lake (Badin) isnt on the hot maps but when I veiw it on computer it dosent show anything, cant even browse other lakes.it shows the waypoint I selected but I cant look at lake(even if it is just the outline) or how far it is from one waypoint to another. All I see is the waypoint information.anybody else having same problem as me with HummingbirdPC? I tried the navionics program but then I cant change it to anything Hummingbird would take. I have a Garmin GPS in the car, It has Map Source. It is a good program to me. but also havnt found the right file converter to change it to hummingbird format. I will find a way to do it but most dont envolve that expencive "KIT" from hummingbird. I have tried HummingbirdPC, NavPlanner, GPS Utility,Map Source, nRoute. I can make a map like I want but havnt been able to convert them yet.
 pictures are saved in bitmap (bmp) a generic format that any computer can open. if you save it on a SD you can take it to a program as WVBowhunter said and put arrows, text even a picture of your wife if you like. then put it back on SD and it will still work as long as you didnt change the size or BMP. I like that part and it only requires a SD card and any reader. Yall probably already know this but figured I would say it so it would be writ.

Thanks for the feedback, guys.  I'm going to practice with it every chance I get.  I try to learn something new each time out,  but I still don't even have all the stuff down pat for  the lowrance units.  I compared the two yesterday on regular sonar, and the HB seemed to do pretty good, but I think it was lying to me at times.  There's a lot of underwater floating debris (grass) in the Waccamaw River where I was, and I think it was thrown off at times, compared to the lowrance.  I can adjust the lowrance to get rid of that stuff, but haven't played with the HB enough yet.  I think it will do ok, though.

Michael: these are a couple of shots of the 'doors'.  I'm still playing around with settings, and I have some noise on the right that may be coming from all the boat wakes on the lake yesterday; not certain.  Hopefully I can get some better shots by the time I go out again.  I think I'm gonna like the side imaging, but I'm not overly impressed with the standard sonar, compared side by side with my lowrance.  Maybe if I play around with the settings there it will be better for me. 

Does anyone have an idea what I'm seeing here?  Same location; different shots.  Maybe an old well, or sinkhole?  Look at the down sonar, then the side image.