diff --git a/docs/projectconf.rst b/docs/projectconf.rst
index 34c0feeb..53656704 100644
--- a/docs/projectconf.rst
+++ b/docs/projectconf.rst
@@ -435,14 +435,8 @@ See built-in examples of `PlatformIO build scripts <https://github.com/platformi
 ^^^^^^^^^^^
 
 A list with targets which will be processed by :ref:`cmd_run` command by
-default. You can enter more then one target separated with "space".
-
-Pre-built targets:
-
-* ``clean`` delete compiled object files, libraries and firmware binaries
-* ``upload`` enable "auto-uploading" for embedded platforms after building
-  operation
-* ``envdump`` dump current build environment
+default. You can enter more then one target separated with "space". Which
+targets are supported is described in :option:`platformio run --target`.
 
 **Tip!** You can use these targets like an option to
 :option:`platformio run --target` command. For example:
diff --git a/docs/userguide/cmd_run.rst b/docs/userguide/cmd_run.rst
index 62cd265c..fbe3f92d 100644
--- a/docs/userguide/cmd_run.rst
+++ b/docs/userguide/cmd_run.rst
@@ -33,7 +33,16 @@ Process specified environments
 .. option::
     -t, --target
 
-Process specified targets
+Process specified targets.
+
+Pre-built targets:
+
+* ``clean`` delete compiled object files, libraries and firmware/program binaries
+* ``upload`` enable "auto-uploading" for embedded platforms after building
+  operation
+* ``uploadlazy`` upload existing firmware without project rebuilding
+* ``envdump`` dump current build environment
+* ``size`` print the size of the sections in a firmware/program
 
 .. option::
     --upload-port