This is a belated response to Ioannis in http://lists.wfu.edu/pipermail/gretl-users/2017-November/012785.html <quote> (A) Can we enlarge the option "Percentage change of selected variable" in the "Add" menu to "Percentage change of selected variable_s_" ? (as is the case for most other options) (B) Can we introduce log changes as well in the "Add" menu "Percentage change of selected variable(s)" option, for example, by enlarging the window in the percentage changes? 100*log(Yt/Yt(-1), monthly (etc depending on frequency data) 12*100*log(Yt/Yt(-1)) for %m-o-m annualized (etc depending on frequency data) 100*log(Yt/Yt(-12)) for %y-o-y (etc depending on frequency data) It is very convenient (especially for teaching purposes) instead of log from the menu and then multiplying by 100 or 12*100 and so on. </quote> OK, that's now in git and snapshots. When defining a percentage change for a single variable you're asked to choose a name yourself; when multiple variables are selected the names are auto-generated as pc_<varname>. Allin