diff --git a/ui/files.js b/ui/files.js
index 18cf8013..d8f7c951 100755
--- a/ui/files.js
+++ b/ui/files.js
@@ -603,9 +603,9 @@ function exportTo(path, im_name, dir_name, size){
 			// file name w.o. ext...
 			dest = dest.replace('%n', orig.split('.')[0])
 			// ext...
-			dest = dest.replace('%e', src.split('.').pop())
+			dest = dest.replace('%e', '.'+src.split('.').pop())
 			// marked status...
-			dest = dest.replace('%m', MARKED.indexOf(gid) >= 0 ? 'm' : '')
+			dest = dest.replace(/%\(([^)]*)\)m/, MARKED.indexOf(gid) >= 0 ? '$1' : '')
 			// gid...
 			dest = dest.replace('%gid', gid)
 			dest = dest.replace('%g', gid.slice(34))
diff --git a/ui/ui.js b/ui/ui.js
index 5b992ea1..cdcb8a6e 100755
--- a/ui/ui.js
+++ b/ui/ui.js
@@ -754,6 +754,7 @@ function getDir(message, dfl, btn){
 /***************************************** Domain-specific dialogs ***/
 
 // XXX do reporting...
+// XXX would be nice to save settings...
 function exportPreviewsDialog(state, dfl){
 	dfl = dfl == null ? BASE_URL : dfl
 
@@ -776,8 +777,8 @@ function exportPreviewsDialog(state, dfl){
 	cfg['Image name pattern | '+
 			'%f - full filename\n'+
 			'%n - filename\n'+
-			'%e - extension\n'+
-			'%m - marked status ("m"/"")\n'+
+			'%e - extension (with leading dot)\n'+
+			'%(abc)m - if marked insert "abc"\n'+
 			'%gid - log gid\n'+
 			'%g - short gid\n'+
 			'%I - global order\n'+