Specify the default settings for reference lines

File > Options > Graphics > Frame Elements > Reference Lines

Specify the default settings for reference lines on graphs. The changes you make to the defaults remain until you change them again, even after you exit Minitab.

Default settings for reference line attributes

File > Options > Graphics > Frame Elements > Reference Lines > Attributes

Specify the default type, color, and size (thickness) of reference lines on graphs.

Default settings for the font of reference line labels

File > Options > Graphics > Frame Elements > Reference Lines > Font

Specify the default settings for the name, style, size, and color of the font of labels on reference lines.