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Created attachment 673 [details] example of typical equation 1. i) select text element (e.g. Bz) ii) delete it iii) move to msup>base iv) ctrl+x to insert text and see what happen: <msub><mrow><mtext/><mtext/></mrow></msub> 2. Put the cursor before "|=+". Try to move right. Should be: "=|+". Actually: "=+|". Similarly it is difficult to navigate other operators. For example, Delta, or invisible times and apply function operators.