librecalc

switch between absolute/relative cell ref

edit the fomrula, hit F4 on cell ref to switch between rel, abs, partial abs col/row

change default font

sidebar settings ( gear on the sidebar ) / Properties
- set character under Character
- Update Selected Style on Style with Default Cell Style
File / Templates / Save as Template
- choose category: My Templates
- Template Name: defaultCalc ( or what's preferred )
- check Set as default template

Suggested font for maths with l disambiguated : Bitstream Vera Sans Mono