diff --git a/slave-daughter/slave-daughter.sch b/slave-daughter/slave-daughter.sch
--- a/slave-daughter/slave-daughter.sch
+++ b/slave-daughter/slave-daughter.sch
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!DOCTYPE eagle SYSTEM "eagle.dtd">
-<eagle version="6.2">
+<eagle version="6.3">
 <drawing>
 <settings>
 <setting alwaysvectorfont="no"/>
@@ -180,6 +180,10 @@ Standard 8.5x11 US Letter frame</descrip
 <sheet>
 <plain>
 <text x="157.734" y="26.416" size="5.08" layer="94" font="vector">Slave Daughterboard</text>
+<text x="38.1" y="154.94" size="5.08" layer="91">Pin Headers</text>
+<text x="55.88" y="142.24" size="5.08" layer="91">I2C Bus</text>
+<text x="73.66" y="132.08" size="5.08" layer="91">Sensors</text>
+<text x="91.44" y="121.92" size="5.08" layer="91">Supporting Circuitry</text>
 </plain>
 <instances>
 <instance part="FRAME1" gate="G$1" x="0" y="0"/>