Some of my 12.2 charts have the horizontal/vertical anchors (little white triangles) to make space above or below the bars, and pull the right edge away from the price scale but some don't,

How do I turn this feature on and off?

TC user since 1994

All of your charts should have these anchors if the chart is large enough. On my computer that means the chart needs to be at approximately 350 pixels tall and 600 pixels wide.