You can find the bed size under the printer settings.

Here is a little video that shows it.

You need to export as gcode to get the results you are looking for.

The problem is probably that the firmware does not allow the printer to go below z 0. You can disable this in the firmware or increase the height that the printer thinks it is (in firmware) so that the nozzle can get down to the bed everywhere and still be above z 0.

You should check that the part is actually flat on the bed (and flat on the bottom). The easiest way to do this would be to push it down into the bed and see what results you get.

When we have seen this it is almost always due to the part not actually being flat on the bed.

First you need to show the printer settings page. This is hidden by default as non-advanced users do not need to configure their printers.

Then it is in the third section:

You can adjust the cooling options of your printer settings. The easiest thing to do is change the slow down time to be really low. I you change this to 5 seconds (or 1 second) your print will not slow down on small layers.

This will cause other problems (like not enough cooling) but it may help you get a specific result you are trying to achieve.

Sorry for the inconvenience. It seems that we may have changed this in a way that causes it to not extruder the full amount required for loading and unloading. This should be fixed in the next build, and hopefully it is easy to get filament loaded and unloaded until we get this fix released. We should have a new build early in April (alpha and beta by the end of this month).

Thanks for reporting this.

Another thing that could be improved

T0 = temperature
T1 = temperature1
T2 = temperature2
T3 = temperature3

Hope that helps.

It actually goes:
User
Material
Quality
Base

With a bit of special consideration when a quality or material setting is turned on. It trumps the user setting until a new user setting is added above it.

We plan to continue to improve this and hope to make it much clearer with a new ui that shows the layering explicitly.

Thanks for sharing your discoveries.

Thanks for the feedback. We have an issue in GitHub for the re-slicing and will git it fixed for the next release. We are also working to improve support, now that we have this new system.

You should still be able to create support everywhere. If there is a specific model that is not generating support correctly, filing an issue in GitHub and attaching or linking to the model is the best way to let the developers know.

We know you come to depend on our software working correctly, and that it is very problematic when there are bugs. We will work to correct these things as soon as possible.

Thanks again, Lars.