diff --git a/.gitignore b/.gitignore
new file mode 100755
index 000000000..c81441881
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+_build
+images
diff --git a/Makefile b/Makefile
index 7d2e6fd9c..d67e4cf80 100755
--- a/Makefile
+++ b/Makefile
@@ -6,7 +6,7 @@
 VERSION_MAJOR        := 1
 VERSION_MINOR        := 15
 
-BUILD_DIR            := build
+BUILD_DIR            := _build
 PROJECT              := picoprobe
 
 
@@ -73,16 +73,16 @@ flash: all
 .PHONY: create-images
 create-images:
 	$(MAKE) clean-build
-	$(MAKE) cmake-create-debug PICO_BOARD=pico OPT_SIGROK=1
+	$(MAKE) cmake-create-release PICO_BOARD=pico OPT_SIGROK=0
 	$(MAKE) all
 	mkdir -p images
 	cp $(BUILD_DIR)/$(PROJECT).uf2 images/yapicoprobe-$(shell printf "%02d%02d" $(VERSION_MAJOR) $(VERSION_MINOR))-pico-$(GIT_HASH).uf2
 	#
-	$(MAKE) cmake-create-debug PICO_BOARD=pico_w OPT_SIGROK=1
+	$(MAKE) cmake-create-release PICO_BOARD=pico_w OPT_SIGROK=0
 	$(MAKE) all
 	cp $(BUILD_DIR)/$(PROJECT).uf2 images/yapicoprobe-$(shell printf "%02d%02d" $(VERSION_MAJOR) $(VERSION_MINOR))-picow-$(GIT_HASH).uf2
 	#
-	$(MAKE) cmake-create-debug PICO_BOARD=pico_debug_probe OPT_SIGROK=0
+	$(MAKE) cmake-create-release PICO_BOARD=pico_debug_probe OPT_SIGROK=0
 	$(MAKE) all
 	cp $(BUILD_DIR)/$(PROJECT).uf2 images/yapicoprobe-$(shell printf "%02d%02d" $(VERSION_MAJOR) $(VERSION_MINOR))-picodebugprobe-$(GIT_HASH).uf2
 
@@ -91,3 +91,8 @@ create-images:
 check-clang:
 	# clang-tidy has its limit if another target is used...
 	@cd $(BUILD_DIR) && run-clang-tidy -checks='-clang-analyzer-security.insecureAPI.DeprecatedOrUnsafeBufferHandling'
+
+.PHONY: show-options
+show-options:
+	@cd $(BUILD_DIR) && cmake -LH . | sed -n -e '/OPT_/{x;1!p;g;$!N;p;D;}' -e h
+
diff --git a/README.adoc b/README.adoc
index 920b35564..e48eaa245 100644
--- a/README.adoc
+++ b/README.adoc
@@ -32,7 +32,7 @@ Finally there is **Y**et **A**nother **Picoprobe** around, the YAPicoprobe.
 ** UART connection between target and probe is redirected
 ** RTT terminal channel is automatically redirected into this CDC (if there is no
    CMSIS-DAPv2/MSC connection)
-* https://www.segger.com/products/development-tools/systemview/[SystemView] support over TCP/IP (ECM/NCM/RNDIS)
+* https://www.segger.com/products/development-tools/systemview/[SystemView] support over TCP/IP (NCM/ECM/RNDIS)
 * CDC - virtual com port for (debug) logging of the probe
 * optional CDC sigrok probe - data collection on eight digital and three analog channels
   (logic analyzer and oscilloscope) with auto-trigger capability
@@ -357,7 +357,7 @@ The Pico Debug Probe has four additional LEDs.  Assignment is as follows:
 
 ## Configuration
 
-### udev rules for MSC and CMSIS-DAP
+### udev rules
 
 Under Linux one wants to use the following udev rules for convenience.
 
@@ -530,10 +530,10 @@ git submodule update --init
 .General build sequence
 [source,bash]
 ----
-# create build/ninja.build for a debug target
+# create _build/ninja.build for a debug target
 make cmake-create-debug
 
-# build yapicoprobe, output in build/picoprobe.uf2
+# build yapicoprobe, output in _build/picoprobe.uf2
 make all
 
 # clean build files
@@ -563,8 +563,9 @@ cmake --build .
 # output in picoprobe.elf/uf2/hex/bin
 ----
 
-If you want to know the several options use the one liner
-`cmake -LH .. | sed -n -e '/OPT_/{x;1!p;g;$!N;p;D;}' -e h`.
+If you want to know the several options use the one liner in the build directory:
+`cmake -LH . | sed -n -e '/OPT_/{x;1!p;g;$!N;p;D;}' -e h`. +
+Or use simply `make show-options` in the projects root.
 
 
 ### Code Inherited