Help > Authoring > Equations > Inserting Math Elements in an Equation > Adding Matrices > Deleting a Column from a Matrix
  
Deleting a Column from a Matrix
To delete the middle column from the following example matrix
This is a picture of a 3x2 matrix with text following it.
1. In the Equation Editor window, click on “M” to place marker. (Putting the marker around “K” would also work.)
2. Choose Constructs > Matrices > Operations > Delete Column.