Index: lams_central/web/includes/javascript/authoring/authoringGeneral.js
===================================================================
diff -u -r6a65d13d5f6d98713395e42f43a466f1c0aab012 -rf53c0f26fff0677ef4aaadadb0d215ec91b670b6
--- lams_central/web/includes/javascript/authoring/authoringGeneral.js	(.../authoringGeneral.js)	(revision 6a65d13d5f6d98713395e42f43a466f1c0aab012)
+++ lams_central/web/includes/javascript/authoring/authoringGeneral.js	(.../authoringGeneral.js)	(revision f53c0f26fff0677ef4aaadadb0d215ec91b670b6)
@@ -1283,7 +1283,10 @@
 			forceRowY = null,
 			paperWidth = paper.attr('width'),
 			// check how many columns current paper can hold
-			maxColumns = Math.floor((paperWidth - layout.conf.arrangeHorizontalPadding) / layout.conf.arrangeHorizontalSpace),
+			// paperMinWidth is used for SVG auto regenerate
+			maxColumns = Math.floor(((paperWidth < 300 && paperMinWidth ? paperMinWidth : paperWidth) 
+									    - layout.conf.arrangeHorizontalPadding)
+					                 / layout.conf.arrangeHorizontalSpace),
 			// the initial max length of subsequences is limited by paper space
 			subsequenceMaxLength = maxColumns,
 	        // a shallow copy of activities array without inner activities