[LG V50 ThinQ Guides, News, & Discussion] XP_2:
I recently switched over to this phone from a Note 8. I've been happy with it except I don't use the Google Assistant. It's not entirely useful for me and I miss being able to remap the Bigsby Button on the Note 8, so I looked for a method of trying to remap it on the LG V50. I found this thread by cavalloz which used Tasker to remap they key, so all credit goes to him. I figured I would let you guys know about it, and then lay out a tutorial-like post in case some people needed more guidance.

First, you will need to disable the google assistant. Settings->General Tab-> Apps & Notifications->Default Apps->Assist & Voice Input. At the bottom, I turned off the open assistant (one press), talk to google (two presses), show visual snapshot (three presses). I have not tested to see if you can disable only the first button press method, because I don't use any of them, but you can try it because I know some of you like Google Lens.

Second, you will need Tasker. It is a paid app, but I feel like it is well worth it for what it provides.

Third, you will need to give Tasker some permissions. You can follow this guide they provide here.

Once Tasker has been closed, you can disconnect your phone from the computer, and then reopen the app. In the Profiles Tab, click the plus button at the bottom to create a new Event in the dropdown menu.

You will need to select System->Logcat Entry, select No in the popup, and you should have an Event Edit screen that says Output Variables, Component and Filter. Click the little magnifying glass icon, grant permissions for writing over other apps, and select OK in the Tasker pop-up.

Now try to be quick to minimize what is captured, but click the orange floating play-button on your screen to start recording, and press the assistant button. Then press the orange button again(now a square) which will stop recording. Tasker will pop-up again, and you will be given a panel containing everything that was recorded, including a response to you pressing the assistant button. In the filter text box field, start typing InputReader and the panel will be reduced to the relevant 'key events' we need.

It should read like

InputReader: Key event: device=4 type=0x0001 value=0x00000000 when=2087698767908

with the numbers being dependent on your phone (I think).

Select one of the events in the pop-up panel, and it will be loaded into the filter portion of the previous Event Edit screen. You should only keep

device=4 type=0x0001 value=0x00000000

in the filter text-field.

Click the back arrow in the top left-hand corner of the screen. You may get a small little box next to the new entry New Task +. Click it, and just click the check mark of the small box that appears at the bottom.

Now in the Task Edit panel, you should be able to click the plus button and add a response to the button press. I used Alert->Torch to toggle the flash-light. In the Action Edit panel, you should be able to change the action from Off to Toggle. Click the back button in the top-left again

Your button should now be able to toggle the flash-light. Let me know if this has worked for you guys. You could get more advanced and set it up for single press, double press, hold, etc.