docs: improve and expand DRM environment variable documentation

- Clarified explanations for `AQ_DRM_DEVICES`, `AQ_NO_ATOMIC`, `AQ_MGPU_NO_EXPLICIT`, and `AQ_NO_MODIFIERS`
- Added more detailed descriptions and use cases for each setting
- Improved formatting for better readability

docs/env.md

@@ -4,10 +4,28 @@ Unless specified otherwise, a variable is enabled if and only if it's set to `1`
 
 ### DRM
 
-`AQ_DRM_DEVICES` -> Set an explicit list of DRM devices (GPUs) to use. It's a colon-separated list of paths, with the first being the primary. E.g. `/dev/dri/card1:/dev/dri/card0`
-`AQ_NO_ATOMIC` -> Disables drm atomic modesetting
-`AQ_MGPU_NO_EXPLICIT` -> Disables explicit syncing on mgpu buffers
-`AQ_NO_MODIFIERS` -> Disables modifiers for DRM buffers
+### DRM Devices and Settings
+
+`AQ_DRM_DEVICES` -> This option allows you to set a specific list of DRM devices (GPUs) for the system to use.  
+  The list is separated by colons (:), and the first device listed will be the primary GPU.  
+  For example: `/dev/dri/card1:/dev/dri/card0`.  
+  This means the system will primarily use `card1` and then fall back to `card0` if needed.
+
+`AQ_NO_ATOMIC` -> Disables atomic mode setting for the DRM.  
+  Atomic mode setting is a feature that makes screen updates more reliable by grouping changes together.  
+  Setting AQ_NO_ATOMIC to 1 can be useful on hardware or drivers that don’t fully support atomic mode setting,  
+  as it can prevent crashes or freezes caused by incomplete or incorrect atomic updates.
+
+`AQ_MGPU_NO_EXPLICIT` -> Disables explicit synchronization between buffers when using multiple GPUs (multi-GPU setups).  
+  Without explicit syncing, the system handles buffer transfers between GPUs more automatically,  
+  which can improve performance in some cases but might introduce errors in more complex setups.
+
+`AQ_NO_MODIFIERS` -> Disables DRM modifiers for buffers.  
+  This can also resolve issues where a monitor fails to turn on or is not detected properly.  
+  DRM modifiers define how pixel data is stored in memory (e.g., in optimized formats).  
+  Setting `AQ_NO_MODIFIERS` to `1` ensures simpler buffer handling,  
+  which might be necessary on hardware that doesn’t support advanced memory layouts,  
+  especially for high resolutions like 4K.
 
 ### Debugging