If you are transitioning from beginner to eventual professional, use the command line.
Make it a habit to memorize the keyboard shortcuts across all drafting and modeling programs. It will dramatically increase your efficiency and make it easier to expand skillsets. It also helps your brain make connections about how the software works, which can save hours of confusion.
Now it is the 50 Command that will made you more effective in Autocad
Calculates the area and perimeter of a defined object or a surface that you select vertex by vertex, according to the metric units defined in settings.
Choose a background image for the work area. It can be a single color (Solid), a gradual color (Gradient) or an image (Image) from your computer.
Generates a bitmap image (.bmp format) after selecting a series of objects, surfaces, or regions.
Creates a 3D box, defining height, width and depth.
Explodes a block or an object, but keeps its attributes intact after exploding it. Highly recommended.
Moves objects from the layout to the model, and vice versa. The best part is that the objects are scaled automatically in the new space.
Choose a layer color for future objects, lines and surfaces.
Creates a dimension aligned with an axis / line.
Creates a dimension aligned with an arc or circle.
Creates a linear, angular or coordinate dimension, starting from a baseline of an earlier dimension.
Creates a radius dimension for circles and arcs. Not to be confused with DIMANGULAR and DIMBASELINE.
Edits the text location of existing dimensions.
Creates a three-dimensional polygonal mesh.
Breaks up an object or block into each of its individual components. Before using, make sure you’re on the right layer.
Displays the coordinates of any point on the worksheet.
Manage lights and lighting effects on 3D models. You will most likely be prompted to change the viewport, or turn off the default lighting.
Import and export materials from and to a library.
Sets up the layout of a drawing.
Restores the most recently deleted items. Its advantage over U is that you can use it after using BLOCK (or WBLOCK, export selected items to a new .DWG file), because those commands can delete selected objects after creating a block.
Unfortunately, you can’t use OOPS after PURGE.
Cleans up your drawings. It goes over your entire model and deletes any duplicate or overlapping items. An incredible help for those who are obsessed with order and clarity in planimetry.
Specifies the page layout, plus the plotting device, paper size, and other settings for each new layout.
Creates a 3D mesh vertex by vertex.
Shows how the drawing will look when printed or sent to a plotter. Before you do this, you need to have configured the layout of the page (PAGESTEUP).
Remove unused objects in the drawing you are working on, through a series of filters: blocks, layers, materials, thickness of lines, texts, among others.
Quickly creates a dimension, after selecting objects.
Quickly creates a leader, and a leader annotation.
Autosave the file. Very useful when AutoCAD stops working and you’ve gone hours without saving any work. If you haven’t named the file yet, it’s the same as SAVEAS.
Quickly select objects according to a list of available filters: colors, line type and layers, among others.
Recovers a damaged file.
Creates a render of the model you're working on.
Creates revolved solids (3D) by rotating 2D objects around a user-defined axis.
Creates a surface that joins two curves previously defined by the user.
Automatically saves all drawings you are working on.
Displays a set of information for a selected object, including line thickness, color, dimensions, radius, and area.
Create a series of freehand drawing segments.
Checks the spelling in texts using the language settings from your operating system, not AutoCAD.
Creates a region from a solid, surface, or region by subtraction.
Calibrates and configures a tablet or Wacom.
Displays a statistics table of the file you are working on: creation date, last update, and edit time. If you’re interrupted, you can activate / deactivate the stopwatch.
The same as Ctrl + Z, undoes the most recent operation.
Deletes an AutoCAD command, even this one. If you want to reverse your decision, REDEFINE.
Manages AutoCad windows for 2D and 3D models.
Creates an infinite line.
Export a file compatible with 3D Studio (.3ds format).