The white arrow at the top can be turned of by a mod at flightsim.to
You can try this mod - No Handle Bar » Microsoft Flight Simulator
Ideally we should have an option built into the sim. I read in the blog that it should have been in the last sim update.
No need 
Backup file named ToolBar.css
Official\OneStore\fs-base-ui-pages\html_ui\Pages\ToolBar
After that go to
Official\OneStore\fs-base-ui-pages\html_ui\Pages\ToolBar\
In notepad++ or notepad open file named ToolBar.css
Go to line 46 (opacity)
Change 1 to 0
Before
After
Save changes and launch MSFS
source https://forums.flightsimulator.com/t/official-discussion-upcoming-hotfix-announcement/436058/615
2 Likes
This bug appeared after SU5 and hasn’t been resolved yet. A workaround until it is fixed is once you are finished with a mouse click/movement is switch to the external camera and press any of the arrow keys and it will fade out until the next mouse click/movement. I saw this an earlier post.
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That’s what mod does, without the need to edit original files.
Read comments
i am seeing CTDS in SU5. Always, replicable CTDs when Going Back to Main Menue. Having it removed no CTDS
Also getting CTD when this mod is active together with the TBM+TBM improvement mod+G3000 mods. Instant CTD when TBM’s battery switch activated. This was repeatable. Removing No Handle Bar mod eliminated the CTD’s.
Same here.
So edit toolbar.css and fly without CTD
Noe need - just press arrow key.
Source https://forums.flightsimulator.com/t/cannot-interact-with-cockpit-buttons/426353/16
Yep, just tried that and since it does shift the camera in cockpit view I just click the opposing key to bring it back. Hope they fix this with SU6.
Thanks everyone will read everything properly and se e what I can sort out.
I’ve tried a mod though and it didn’t work
The White arrow on my monitor goes away if i move the mouse cursor to the far left of the screen, Give it a try and let me know if it works for you.
No, moving the mouse off any side of the scren does nothing. Mods do nothing. Is it worth totally removing and reinstalling? I won’t fly it until sorted
Backup file named ToolBar.css
Official\OneStore\fs-base-ui-pages\html_ui\Pages\ToolBar\Toolbar.css
After that go to
Official\OneStore\fs-base-ui-pages\html_ui\Pages\ToolBar\
In notepad++ or notepad open file named ToolBar.css
Go to line 46 (opacity)
Change 1 to 0
Before
After
Save changes and launch MSFS
1 Like
This worked once I’d removed the mods.
Thank you
You’re very welcome.
Mark as solution.
[SOLUTION] for me.
Thanks, that worked! Even though I’m not familiar playing with computer coding this was straightforward. It totally removes the handle from view vs it going back to the original fade out of probably what “transition” is related to but I never liked the handle anyway. The menu bar still fades out and moussing over brings it right back. This is a long term better solution for me so even if they fix it in the next sim update I know how to turn it off!
1 Like
You’re very welcome.
4 me 2 mate
How to mark as solution? Just preface my post? Not seeing any menu items for “solution”.
Unfortunately in my next flight it returned and won’t go away
Delete toolbar mods - edit toolbar.css file and save changes.
Launch sim.
Done as requested 
1 Like