Update README.md

1 files changed, 17 insertions, 1 deletions

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index 6319f0d..c6911b9 100644
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+++ b/README.md
@@ -29,7 +29,19 @@ Records are stored in the format below. Each record contains the date, time, use
 \x03\x03\x03\n
 ```
 
-# Example
+The `HEADER` block uses the format, `## KEY: VALUE`, is not size limited. A `HEADER` ends with three SOT control codes (`0x02` ASCII "Start of Text").
+
+## Example header block
+```text
+## date: 01/18/2022
+## time: 15:16:14
+## author: example
+## host:   mycomputer.lan
+```
+
+The `MESSAGE` block is not size limited and ends with three EOT control codes (`0x03` ASCII "End of Text").
+
+# Using your favorite editor
 
 If the `EDITOR` environment variable is not defined, `vim` will be opened by default on *NIX systems, and `notepad` on Windows. To change the editor set `EDITOR` to the desired value:
 ```shell
@@ -118,6 +130,10 @@ usage: weekly [-h] [-V] [-dDys] [-]
 
 Weekly Report Generator v1.0.0
 
+Environment Variables:
+WEEKLY_JOURNAL_ROOT          Override journal destination
+                               (i.e. /shared/resource/weeklies/$USER)
+
 Options:
 --help             -h        Show this usage statement
 --dump-relative    -d        Dump records relative to current week