diff --git a/doc/mockup/main-window_mockup.json b/doc/mockup/main-window_mockup.json
new file mode 100644
index 0000000..ce4e894
--- /dev/null
+++ b/doc/mockup/main-window_mockup.json
@@ -0,0 +1,370 @@
+{
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+} 
diff --git a/doc/mockup/main-window_mockup.pdf b/doc/mockup/main-window_mockup.pdf
new file mode 100644
index 0000000..8609d67
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diff --git a/doc/mockup/main-window_mockup.png b/doc/mockup/main-window_mockup.png
new file mode 100644
index 0000000..36c6438
Binary files /dev/null and b/doc/mockup/main-window_mockup.png differ