diff --git a/src/main.tal b/src/main.tal
index c8c2c6b..2b6ca0d 100644
--- a/src/main.tal
+++ b/src/main.tal
@@ -66,20 +66,18 @@
 @filepath $40 ( ext ) $4
 
 ( interface )
-@toolview  [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
-@colorview [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
-@blendview [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
-@dataview  [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
-@preview   [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
-@zoomview  [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
-@tileview
-	&x1 $2 &y1 $2
-	&x2 $2 &y2 $2
-@nametable
-	&x $2 &y $2
-	&x2 $2 &y2 $2
-@workspace-frame  [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
-@zoomview-frame  [ &x1 $2 &y1 $2 &x2 $2 &y2 $2 ]
+
+@toolview        &x1 $2 &y1 $2 &x2 $2 &y2 $2
+@colorview       &x1 $2 &y1 $2 &x2 $2 &y2 $2
+@blendview       &x1 $2 &y1 $2 &x2 $2 &y2 $2
+@dataview        &x1 $2 &y1 $2 &x2 $2 &y2 $2
+@preview         &x1 $2 &y1 $2 &x2 $2 &y2 $2
+@zoomview        &x1 $2 &y1 $2 &x2 $2 &y2 $2
+@tileview        &x1 $2 &y1 $2 &x2 $2 &y2 $2
+@nametable       &x  $2 &y  $2 &x2 $2 &y2 $2
+
+@workspace-frame &x1 $2 &y1 $2 &x2 $2 &y2 $2
+@zoomview-frame  &x1 $2 &y1 $2 &x2 $2 &y2 $2
 
 ( program )
 
@@ -328,6 +326,9 @@ BRK
 			DUP2 #0100 !! ,&no-down JCN
 				.Mouse/x DEI2 .tileview/x1 LDZ2 -- 8// NIP
 				.Mouse/y DEI2 .tileview/y1 LDZ2 -- 8// NIP
+					( select zoom )
+					DUP2 8* .selection/zy LDZ + SWP 8* .selection/zy LDZ + SWP ;set-selection-zoom JSR2
+					( select from )
 					;set-selection-from JSR2
 				,&end JMP
 				&no-down
@@ -509,9 +510,9 @@ RTN
 RTN
 
 @set-selection-zoom ( x y -- )
- 
-	.selection/zy STZ 
-	.selection/zx STZ 
+
+	#7f AND .selection/zy STZ 
+	#7f AND .selection/zx STZ 
 
 RTN
 
@@ -572,8 +573,12 @@ RTN
 
 @mod-selection-zoom ( x y -- )
 
-	.selection/zy LDZ + .selection/zy STZ
-	.selection/zx LDZ + .selection/zx STZ
+	( set zoom )
+	DUP2 
+	.selection/zy LDZ + SWP 
+	.selection/zx LDZ + SWP 
+		;set-selection-zoom JSR2
+	( set from )
 	.selection/zx LDZ 8/ .selection/zy LDZ 8/ ;set-selection-from JSR2
 	;draw-tileview-zoom JSR2
 
@@ -790,10 +795,10 @@ RTN
 	POP2
 	POP2r POP2r
 	( guides )
-	#00 #08 .selection/zy LDZ - 8MOD2 8** #0007 ++ STH2
+	#00 #07 .selection/zy LDZ - 8MOD2 8** #0001 -- #0008 ++ STH2
 	.tileview/x1 LDZ2 .tileview/x2 LDZ2 .tileview/y1 LDZ2 STH2kr ++ #02 ;line-hor-dashed JSR2
 	.tileview/x1 LDZ2 .tileview/x2 LDZ2 .tileview/y1 LDZ2 STH2r ++ #0040 ++ #02 ;line-hor-dashed JSR2
-	#00 #08 .selection/zx LDZ - 8MOD2 8** #0007 ++ STH2
+	#00 #07 .selection/zx LDZ - 8MOD2 8** #0001 -- #0008 ++ STH2
 	.tileview/x1 LDZ2 STH2kr ++ .tileview/y1 LDZ2 .tileview/y2 LDZ2 #02 ;line-ver-dashed JSR2
 	.tileview/x1 LDZ2 STH2r ++ #0040 ++ .tileview/y1 LDZ2 .tileview/y2 LDZ2 #02 ;line-ver-dashed JSR2
 
@@ -1105,7 +1110,7 @@ RTN
 	;make-icn .Screen/addr DEO2
 	#01 .Screen/sprite DEO
 	( filepath )
-	#03 ;draw-filepath JSR2
+	#01 ;draw-filepath JSR2
 
 RTN
 
@@ -1131,7 +1136,7 @@ RTN
 	.toolview/x2 LDZ2 #0008 -- .Screen/x DEO2
 	.toolview/y1 LDZ2 .Screen/y DEO2
 	;save-icn .Screen/addr DEO2
-	#0f05 .state/changed LDZ #01 JCN SWP POP .Screen/sprite DEO
+	#0f05 .state/changed LDZ POP? .Screen/sprite DEO
 
 RTN
 
@@ -1355,7 +1360,7 @@ RTN
 
 	STH STH
 	( y2 ) STHkr #06 + LDZ2
-	( y1 ) STHkr #02 + LDZ2 #0001 -- ( flip sign ) GTH2k #01 JCN SWP2
+	( y1 ) STHkr #02 + LDZ2 #0001 -- ( flip sign ) GTH2k JMP SWP2
 	&ver
 		( save ) DUP2 .Screen/y DEO2
 		( x1 ) STHkr LDZ2 #0001 -- .Screen/x DEO2
@@ -1366,7 +1371,7 @@ RTN
 		INC2 GTH2k ,&ver JCN
 	POP2
 	( x2 ) STHkr #04 + LDZ2
-	( x1 ) STHkr LDZ2 #0001 -- ( flip sign ) GTH2k #01 JCN SWP2
+	( x1 ) STHkr LDZ2 #0001 -- ( flip sign ) GTH2k JMP SWP2
 	&hor
 		( save ) DUP2 .Screen/x DEO2
 		( y1 ) STHkr #02 + LDZ2 #0001 -- .Screen/y DEO2
diff --git a/src/utils.tal b/src/utils.tal
index 4ba7276..4de61c7 100644
--- a/src/utils.tal
+++ b/src/utils.tal
@@ -44,6 +44,8 @@
 %ROL { DUP #07 SFT SWP #10 SFT + }
 %ROR { DUP #70 SFT SWP #01 SFT + }
 
+%POP? { JMP SWP POP }
+
 %RELEASE-MOUSE { #0096 DEO }
 
 %AUTO-NONE { #00 .Screen/auto DEO }