diff --git a/Running-Debugger.md b/Running-Debugger.md
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--- a/Running-Debugger.md
+++ /dev/null
@@ -1,10 +0,0 @@
-```bash
-cd ~/work/stxm-test/build/PixelatorController
-ddd src/PixelatorController-bin
-```
-in debugger
-```run config/NoHardwareSettings.json```
- (no hardware)
-or 
-```run ../../PixelatorController/config/PolLux/settings.json```
- (standard PolLux settings)
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diff --git a/Running-with-a-Debugger.md b/Running-with-a-Debugger.md
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--- /dev/null
+++ b/Running-with-a-Debugger.md
@@ -0,0 +1,10 @@
+Firstly, it is useful to compile without optimisation - edit work/stxm/build/PixelatorController/Makefile to remove `-O2` from the compile flags (currently 3 instances) before running `make`.
+
+Connect the debugger to the binary with:
+```bash
+cd ~/work/stxm-test/build/PixelatorController
+ddd src/PixelatorController-bin
+```
+Then, run the binary in the debugger, passing the appropriate settings file, e.g.:
+- (no hardware) - ```run config/NoHardwareSettings.json```, or
+- (standard PolLux settings) - ```run ../../PixelatorController/config/PolLux/settings.json```
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