6.18.3 Can you answer these questions?

6.18.3.1 Export function not working via JLink in Java8 compiled application

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=228496

I have documented the following issue with evaluating the Export function via J/Link:https://stackoverflow.com/questions/63390977/wolfram-mathematica-kernellink-export-function-not-working-via-jlink-... 
[export] [files-and-directories] [windows]
 

asked by Ceddaerrix https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=74211 1 vote

6.18.3.2 Custom arrowhead will not align properly

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=228631

I am trying to put a custom arrowhead on an arrow I am drawing in a plot. My problem is that the (thick) line of the arrow is showing behind the arrow tip. So it seems like the arrowhead is aligned ... 
[plotting] [graphics]
 

asked by Bjoj https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=36437 1 vote

6.18.3.3 How to control a presenter notebook with a mobile device?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=228733

In the video of the link below, at 1:40 is said that the presentation can be controlled by a mobile device, how can I do that? 
https://www.youtube.com/watch?v=GMHM_iUL_sU 
[slideshows]
 

asked by Daniel Rocha da Silva https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=74279 1 vote