Morning all, I have a need to write a lot of physical quantities - these should be in text mode. Mostly I can manage, but subscripts are causing me grief Eg \startformula \startmathalignment[n=3] \NC \text{F}\NC =\NC {\text{GMm} \over \text r^2}\NR \NC \text {force}_G \NC =\NC {\text{G} \times \text m_1 \times \text m_2 \over \text r^2}\NR \NC \text {force \low G} \NC =\NC {\text{G} \times \text m_1 \times \text m_2 \over \text r^2}\NR \stopmathalignment \stopformula In the second and third equantions I'd like force subscript G all in roman, not italic, to follow the standard conventin. The first one puts the G in the correct place, but in italic The second one manages roman, but it's offset. I suspect I could kludge this with hskips, but I think there should be a more elegant solution. If there is a paper on writing physics in ConTEXt (not maths... I have found the helpful couple by Aditya Mahajan) that would save me time. For most relationships I am planning to use predefine quantities, then slot these in Like this in the header \define \forceQA {{\sl F}/\Newton} \define \forceQU {{\tf force}/{\tf newton}} \define \forceQ {{\tf force}} (etc) And this in the body \startformula {\forceQA \over \massQA} = \accelerationQA \stopformula \startformula {\forceQU \over \massQU} = \accelerationQU \stopformula \startformula {\forceQ \over \massQ} = \accelerationQ \stopformula Any more elegant solutions out there? Thanks Ian