Shady, the garmin is only as powerful as your own knowledge.
For me, I have two screens of four displays rotating, with current speed and current Heart rate always in the two top screens so that they are always visible.
The other two spots on one screen show split distance and split average speed.
The other spots on the second screen show total distance and total average speed.
These are what work for me personally as that is the information I am interested in.
I now know my heart rates very well so HR is the major guide for my paddling.
Speed also lets you hunt out any currents or shallow bottom that effect your speed.
So for me, if I am to head out for an hour and a half race type effort, I already know from training and testing, that I can hold a HR of 162/3 beats for that distance.
This helps guide me to not go out too hard and keep up when I slack off.
Also if there are a lot of runs and I am getting rests, the average HR will show me how hard I am working overall and give me an idea of how much I can go over 162 knowing that there are times to recover between those efforts.
If the distance was 10km or so, then I can run my HR at 168 all the way and still know there is juice left in the tank for a last few km blast to the finish.
If I'm headed out for a two hour plus event, then my HR should be around 157+, with the rate finally dependent on how much sugar I can get into me during the event.
What you choose to display will depend on what you personally need to know.
What ever you display doesn't matter now as you will soon work that out.
But the main thing is that all your paddles are recorded, and from that, your critical heart rates can be gleaned by someone with experience, especially if you have a number of races recorded.
For now, I would suggest just putting up current speed and HR.
Maybe a real time clock if you have time constraints on your workout.
By displaying your HR, you will start to get a feel for it, even if you do not have the depth of knowledge to fully exploit it.
Something I like to use, is to mark a set course for repeats with the lap function.
Then whenever you pass through those same points again, the lap automatically starts and stops again so you don't have to keep reaching down while paddling when you are doing intervals.
Make sure you do the firmware upgrade, it is much better in it's final version.
Be sure to turn on one second updates unless you really need super long recording times.
If you want to send me a link to your workouts in a couple of months time, I'd happily chat with you about trying to glean those HR's.
Happy paddling.
Follow the path of the independent thinker. Expose your ideas to the dangers of controversy. Speak your mind and fear less the label of 'crackpot' than the stigma of conformity. And on issues that are important to you, stand up and be counted at any cost.--- Thomas J. Watson