The first page of `scrlttr2` resp. `scrletter` is somehow special. For example the position of the footer does not only depend on the layout either set using `typearea` or `geometry`, but also on the *pseudo length* `firstfootvpos`. You can visualize that position using ```latex \LoadLetterOption{visualize} \showfields{foot} ``` As already explained in [Schweinebacke's answer](https://tex.stackexchange.com/a/33646/277964) to: [How to avoid empty space at the end of a page when using scrlttr2?](https://tex.stackexchange.com/q/17596/277964) the larges text area on the first page can be achieved using option `firstfoot=false,enlargefirstpage`. Another problem with your code is, that loading `geometry` changes the layout parameters but does not automatically adjust the depending *pseudo lengths*. These are already setup by loading the default `DIN.lco`, where you can find: ```latex \setplength{firstfootvpos}{1in}% \addtoplength{firstfootvpos}{\topmargin}% \addtoplength{firstfootvpos}{\headheight}% \addtoplength{firstfootvpos}{\headsep}% \addtoplength{firstfootvpos}{\textheight}% \addtoplength{firstfootvpos}{\footskip}% ``` So `firstfootvpos` depends on not only one but several layout lengths, which `geometry` sets depending on the font size. So it is not unexpected, that changing the font size and loading `geometry` without re-loading the letter option `DIN.lco` results in somehow strange settings. So the first step to get valid result, would be to add ```latex \LoadLetterOption{DIN}% or whatever letter option you are using ``` after loading `geometry`: ```latex \documentclass[a4paper,12pt,version=last]{scrlttr2}%,fontsize=10pt \usepackage{fontspec}% for lualatex \usepackage{geometry} \usepackage[latin]{babel} % for lipsum \usepackage{lipsum} \usepackage{showframe} \setkomavar{subject}[]{\the\dimexpr\useplength{firstfootvpos}\relax} \LoadLetterOption{DIN}% Load it again after changing the layout by loading geometry \LoadLetterOption{visualize} \showfields{foot} %\KOMAoptions{enlargefirstpage} %\KOMAoptions{firstfoot=false} \begin{document} \begin{letter}{% CapMini GmbH \\ Egon Walther\\ Walthershofener Straße 20\\ 88444 Walthershofen\\ } \opening{Salve Egon,} \lipsum{1} \closing{Regards}% IMHO \\[2\baselineskip] is nonsense here, so I've removed it \end{letter} \end{document} ``` [![enter image description here][1]][1] [1]: https://i.sstatic.net/42btY1Lj.png