Helper grid or scene bounds in Unity 2D

Getting Started
1

I’m new to Unity and am trying to make some small 2D games to get the hang of the editor. I’d like to know if there’s a way to toggle a helper grid on when in Scene mode so that I can position elements more easily on screen.

Also, if there’s a way to put guides/helper lines on so that I know where the edges of my scene/screen will be whilst working, that would be super useful!

2

Morning, I had a bit of code that would use screen gizmos, might help u a bit.
I just made it to show me lines in a grid based on how high and wide, also what size I wanted the grid. Helped me a bit a while ago to try and get a rough idea of 2d screen real estate.
Hope it gives u a starting point to look at.

   using UnityEngine;
   using System.Collections;
 
   public class DrawGridLines  : MonoBehaviour {
    
      public float gridSpacingX = 0.5f;
      public float gridSpacingY = 0.5f;
    
      public int blocksWide =32;
      public int blocksHigh = 24;
    
      public Vector3 gridCentre;
    
    
      Vector3 GetLowerLeftDrawPoint(int squaresWide , int squaresHigh ) // returns the starting point at the lower left point
      {
         float xPos =(float)( -((squaresWide * gridSpacingX)/2) + gridCentre.x);
         float yPos = (float)(-((squaresHigh * gridSpacingY)/2) + gridCentre.y);
         return new Vector3 (xPos, yPos, 0f);
      }
    
    
      void OnDrawGizmos ()
      {
         Gizmos.color = Color.grey;
         Vector3 lowerLeftStartPoint = GetLowerLeftDrawPoint(blocksWide, blocksHigh);
       
         float lineLength = blocksWide * gridSpacingX;
         for( int xLine = 0 ; xLine <= blocksHigh ; xLine++)
         {
            Vector3 vFrom =  lowerLeftStartPoint + new Vector3(0f,(float)(xLine * gridSpacingY), 0f);
            Vector3 vTo = vFrom + new Vector3(lineLength, 0f, 0f);
            Gizmos.DrawLine (vFrom, vTo);
         }
       
         // draw the vertical lines now
         lineLength = blocksHigh * gridSpacingY;
         for (int yLine = 0; yLine <= blocksWide ; yLine++)
         {
            Vector3 hFrom = lowerLeftStartPoint + new Vector3((float)(yLine * gridSpacingX), 0f, 0f);
            Vector3 hTo = hFrom + new Vector3(0f, lineLength, 0f);
            Gizmos.DrawLine (hFrom, hTo);
         }
       
       
      }
   }
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