If you mean AutoCAD and isometric viewshere’s a simple explanation
AutoCAD Isometric Views
An isometric drawingis a 2D representation of a 3D object where the three main directions are shown at 30° anglesto the horizontal
In AutoCAD, you can create isometric drawings using Isometric Snap
How to turn on Isometric Snap
Open AutoCAD.
Press F5 (or Ctrl + E) to switch between isometric planes.
Set the drafting mode to Isometric Snap
You will see three planes
Left Top
Right
Use LINE (L)CIRCLE (C)OFFSET (O)etc. to draw your object.
Important angles
Left/right isometric lines → 30° and 150°
Vertical lines → 90°
Isometric circles are drawn as ellipsesusing Isocircle
If you’re learning AutoCAD for an exam, engineering drawing, or interviewI can also teach you isometric drawing step-by-step with a simple example