revert caption for side-by-side

Author: Julie Hogan

episodes/02-tracker.md

@@ -57,10 +57,13 @@ This part of the tracker contains 15,200 highly sensitive modules with a total o
 
 The silicon detectors work in much the same way as the pixels: as a charged particle crosses the material it knocks electrons from atoms giving a very small pulse of current lasting a few nanoseconds. This small amount of charge is then amplified by Analogue Pipeline Voltage (APV25) chips, giving us “hits” when a particle passes, allowing us to reconstruct its path. Four or six such chips are housed within a “hybrid”, which also contains electronics to monitor key sensor information, such as temperature, and provide timing information in order to match “hits” with collisions.
 
-![Left: An event display view of the CMS tracker (contained within the ECAL barrel) looking along the beam pipe. Right: An event display view of reconstructed tracks.](../fig/tracker_rphi.png){width="48%"} | ![](../fig/tracker_rphi_tracks.png){width="48%"}
+![](../fig/tracker_rphi.png){width="48%"} | ![](../fig/tracker_rphi_tracks.png){width="48%"}
 
-![Left: A projected event display view of the CMS tracker (contained within the ECAL barrel and endcaps) looking perpendicular to the beam pipe. Right: A projected event display view of reconstructed tracks.](../fig/tracker_rz.png){width="48%"} | ![](../fig/tracker_rz_tracks.png){width="48%"}
+*Above left: An event display view of the CMS tracker (contained within the ECAL barrel) looking along the beam pipe. Right: An event display view of reconstructed tracks.*
 
+![](../fig/tracker_rz.png){width="48%"} | ![](../fig/tracker_rz_tracks.png){width="48%"}
+
+*Above left: A projected event display view of the CMS tracker (contained within the ECAL barrel and endcaps) looking perpendicular to the beam pipe. Right: A projected event display view of reconstructed tracks.*
 
 :::::::::: keypoints
 

episodes/03-ecal.md

@@ -33,7 +33,9 @@ Photodetectors, which have been especially designed to work within the high magn
 
 For extra spatial precision, the ECAL also contains a preshower detector that sits in front of the endcaps. These allow CMS to distinguish between single high-energy photons (often signs of exciting physics) and the less interesting close pairs of low-energy photons.
 
-![Left: An event display of two electron tracks (green lines). The ECAL barrel and endcaps are shown by the blue volumes and especially in the endcaps one can make out individual crystals. The green volumes respresent the energy deposits in the crystals. Right: A close up of the energy deposits in each crystal.](../fig/ecal_0.png){width="48%"} | ![](../fig/ecal_1.png){width="48%"}
+![](../fig/ecal_0.png){width="48%"} | ![](../fig/ecal_1.png){width="48%"}
+
+*Above left: An event display of two electron tracks (green lines). The ECAL barrel and endcaps are shown by the blue volumes and especially in the endcaps one can make out individual crystals. The green volumes respresent the energy deposits in the crystals. Right: A close up of the energy deposits in each crystal.*
 
 ::::::::::: keypoints
 

episodes/06-muon.md

@@ -38,7 +38,9 @@ DTs and RPCs are arranged in concentric cylinders around the beam line (“the b
 
 ### Drift tubes
 
-![Installation of a wheel of drift tubes.](../fig/oreach-2007-001_08.jpg){width="48%"} | ![Event display of two muons seen in CMS with matching drift tubes.](../fig/muon_event_dt.png){width="48%"}
+![](../fig/oreach-2007-001_08.jpg){width="48%"} | ![](../fig/muon_event_dt.png){width="48%"}
+
+*Above left: Installation of a wheel of drift tubes. Right: Event display of two muons seen in CMS with matching drift tubes.*
 
 The drift tube (DT) system measures muon positions in the barrel part of the detector. Each 4-cm-wide tube contains a stretched wire within a gas volume. When a muon or any charged particle passes through the volume it knocks electrons off the atoms of the gas. These follow the electric field ending up at the positively-charged wire.
 
@@ -71,7 +73,9 @@ In addition to providing precise space and time information, the closely spaced
 
 Resistive plate chambers (RPC) are fast gaseous detectors that provide a muon trigger system parallel with those of the DTs and CSCs.
 
-![The positions of the RPCs in the barrel and endcaps highlighted in green](../fig/muons_0.png){width="32%"} | ![](../fig/muons_rpc_barrel.png){width="32%"} | ![](../fig/muons_rpc_endcaps.png){width="32%"}
+![](../fig/muons_0.png){width="32%"} | ![](../fig/muons_rpc_barrel.png){width="32%"} | ![](../fig/muons_rpc_endcaps.png){width="32%"}
+
+*Above: The positions of the RPCs in the barrel and endcaps highlighted in green.*
 
 RPCs consist of two parallel plates, a positively-charged anode and a negatively-charged cathode, both made of a very high resistivity plastic material and separated by a gas volume.
 
@@ -81,7 +85,7 @@ When a muon passes through the chamber, electrons are knocked out of gas atoms.
 
 
 
-:::::::::::: keypoints:
+:::::::::::: keypoints
 
 - There are three main muon detector systems in CMS: the drift tubes, cathode strip chambers, and resistive plate chambers.