Created attachment 174523 [details] Example of grad deg and rad KCalc use a combo box to swith between different bases (decimal, hexadecimal, ecc). This is quite inconvenient because very frequently one needs to convert numbers between, say, decimal to hexadecimal, or binary. There is a line on the interface containing only one small combo box. It should be used more efficiently putting a radio button so changing between bases will become immediate.
Created attachment 174524 [details] Example of wasted space for base switch
This was changed to have more space for the "numeral system view", so the converted numbers do't get elided (most of the time), see also https://develop.kde.org/hig/getting_input/, in this case we have 4 options and not much space with the current layout, for now we will leave it as it is, some refactoring of the component would be required to accommodate this and probably won't happen soon.