diff --git a/.gitignore b/.gitignore
index e640430..09bc759 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,5 +4,4 @@
 *gif~
 *bmp~
 nasu
-nasu-export.chr
-nasu-render.bmp
\ No newline at end of file
+untitled.chr
\ No newline at end of file
diff --git a/README.md b/README.md
index 6a89206..6e2918b 100644
--- a/README.md
+++ b/README.md
@@ -39,4 +39,5 @@ To resume working on a tileset:
 ### Paint
 
 - `mouse1` Paint
-- `mouse1+mouse2` Erase
+- `mouse2` Line
+- `mouse1+mouse3` Erase
diff --git a/nasu.c b/nasu.c
index c634c81..b732850 100644
--- a/nasu.c
+++ b/nasu.c
@@ -45,15 +45,15 @@ Uint32 theme[] = {
 	0x222222};
 
 Uint8 icons[][8] = {
-	{0x38, 0x7c, 0xfe, 0xfe, 0xfe, 0x7c, 0x38, 0x00},
-	{0x38, 0x44, 0x82, 0x82, 0x82, 0x44, 0x38, 0x00},
-	{0x02, 0x02, 0x04, 0x38, 0x40, 0x80, 0x80, 0x00},
-	{0x88, 0x00, 0x22, 0x00, 0x88, 0x00, 0x22, 0x00},
-	{0xaa, 0x54, 0xaa, 0x54, 0xaa, 0x54, 0xaa, 0x00},
-	{0x38, 0x7c, 0xee, 0xd6, 0xee, 0x7c, 0x38, 0x00},
-	{0x44, 0xba, 0x44, 0x44, 0x44, 0xba, 0x44, 0x00},
-	{0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00},
-	{0xee, 0xaa, 0xee, 0x00, 0xee, 0xaa, 0xee, 0x00},
+	{0x38, 0x44, 0x82, 0x82, 0x82, 0x44, 0x38, 0x00}, /* color:blank */
+	{0x38, 0x7c, 0xfe, 0xfe, 0xfe, 0x7c, 0x38, 0x00}, /* color:full */
+	{0x02, 0x02, 0x04, 0x38, 0x40, 0x80, 0x80, 0x00}, /* brush:line */
+	{0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0xfe, 0x00}, /* brush:pattern0 */
+	{0xaa, 0x54, 0xaa, 0x54, 0xaa, 0x54, 0xaa, 0x00}, /* brush:pattern2 */
+	{0x88, 0x00, 0x22, 0x00, 0x88, 0x00, 0x22, 0x00}, /* brush:pattern4 */
+	{0x44, 0xba, 0x44, 0x44, 0x44, 0xba, 0x44, 0x00}, /* brush:cleanup */
+	{0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00, 0xaa, 0x00}, /* view:grid */
+	{0xee, 0x92, 0x82, 0x54, 0x82, 0x92, 0xee, 0x00}, /* view:bigpixels */
 	{0x00, 0x00, 0x00, 0x82, 0x44, 0x38, 0x00, 0x00}, /* eye open */
 	{0x00, 0x38, 0x44, 0x92, 0x28, 0x10, 0x00, 0x00}  /* eye closed */
 };
@@ -65,6 +65,12 @@ Uint32 *pixels;
 
 /* helpers */
 
+int
+clamp(int val, int min, int max)
+{
+	return (val >= min) ? (val <= max) ? val : max : min;
+}
+
 char *
 scpy(char *src, char *dst, int len)
 {
@@ -122,9 +128,7 @@ void
 putchr(int x, int y, int color)
 {
 	int row = rowchr(x, y), col = x % 8;
-	if(x < 0 || x >= HOR * 8)
-		return;
-	if(y < 0 || y >= VER * 8)
+	if(x < 0 || x >= HOR * 8 || y < 0 || y >= VER * 8)
 		return;
 	if(color == 0 || color == 2)
 		doc.data[row] &= ~(1UL << (7 - col));
@@ -158,11 +162,11 @@ jagg(int x, int y)
 int
 patt(int x, int y, int mode)
 {
-	if(mode == 1)
+	if(mode == 3)
 		return ((x + y) % 4) == 0 && ((y - x) % 4) == 0;
 	if(mode == 2)
 		return ((x + y) % 2) == 0 && ((y - x) % 2) == 0;
-	if(mode == 3)
+	if(mode == 1)
 		return 1;
 	return 0;
 }
@@ -263,7 +267,7 @@ drawicon(Uint32 *dst, int x, int y, Uint8 *icon, int fg, int bg)
 void
 drawui(Uint32 *dst)
 {
-	int bottom = VER * 8 + 8;
+	int bottom = HEIGHT - 40;
 	drawicon(dst, 0, bottom, brush.color == 1 ? icons[1] : icons[0], 1, 0);
 	drawicon(dst, 8, bottom, brush.color == 2 ? icons[1] : icons[0], 2, 0);
 	drawicon(dst, 16, bottom, brush.color == 3 ? icons[1] : icons[0], 3, 0);
@@ -312,37 +316,30 @@ setmode(int *i, int v)
 }
 
 void
-setrange(int *i, int v, int min, int max)
-{
-	*i = v < min ? min : v > max ? max
-								 : v;
-	redraw(pixels);
-}
-
-void
-newchr(void)
+makedoc(Document *d, char *name)
 {
 	int i;
 	for(i = 0; i < SZ; ++i)
-		doc.data[i] = 0x00;
-	scpy("untitled.chr", doc.name, 256);
-	printf("New: %s\n", doc.name);
+		d->data[i] = 0x00;
+	scpy(name, d->name, 256);
+	printf("Made: %s\n", d->name);
 	redraw(pixels);
 }
 
 int
-savechr(void)
+savedoc(Document *d, char *name)
 {
-	FILE *f = fopen(doc.name, "w");
-	if(!fwrite(doc.data, sizeof(doc.data), 1, f))
-		return error("Export", "Failure");
+	FILE *f = fopen(name, "w");
+	if(!fwrite(d->data, sizeof(d->data), 1, f))
+		return error("Save", "Failure");
+	scpy(name, d->name, 256);
 	fclose(f);
-	printf("Save: %s\n", doc.name);
+	printf("Saved: %s\n", d->name);
 	return 1;
 }
 
 int
-openchr(char *name)
+opendoc(Document *d, char *name)
 {
 	FILE *f = fopen(name, "r");
 	if(!f)
@@ -357,7 +354,7 @@ openchr(char *name)
 }
 
 int
-renderbmp(void)
+savebmp(void)
 {
 	SDL_Surface *surface = SDL_GetWindowSurface(gWindow);
 	SDL_RenderReadPixels(gRenderer,
@@ -422,25 +419,21 @@ domouse(SDL_Event *event)
 			brush.down = 1;
 		if(event->button.button == SDL_BUTTON_RIGHT)
 			brush.erase = 1;
-		if(event->button.button == SDL_BUTTON_MIDDLE) {
-			brush.erase = 0;
-			if(brush.px != 0 && brush.py != 0) {
-				brush.x = screenpos(event->motion.x, brush.vx);
-				brush.y = screenpos(event->motion.y, brush.vy);
-				line(brush.px, brush.py, brush.x, brush.y, brush.erase ? 0 : brush.color);
-				redraw(pixels);
-			}
-		}
+		if(event->button.button == SDL_BUTTON_MIDDLE)
+			line(brush.px, brush.py, screenpos(event->motion.x, brush.vx), screenpos(event->motion.y, brush.vy), brush.erase ? 0 : brush.color);
 		brush.px = screenpos(event->motion.x, brush.vx);
 		brush.py = screenpos(event->motion.y, brush.vy);
 		if(!BIGPIXEL) {
-			brush.vx = (brush.px / 8) * 8;
-			brush.vy = (brush.py / 8) * 8;
+			brush.vx = clamp((brush.px / 8) * 8, 0, WIDTH - HOR - 2 * PAD * 8);
+			brush.vy = clamp((brush.py / 8) * 8, 0, HEIGHT - VER - 3 * PAD * 8);
 		}
-		if(brush.down && brush.mode == 0) {
-			putchr(brush.px, brush.py, brush.erase ? 0 : brush.color);
-			redraw(pixels);
+		if(brush.down) {
+			if(brush.mode == 0)
+				putchr(brush.px, brush.py, brush.erase ? 0 : brush.color);
+			else
+				fill(brush.px, brush.py, brush.mode, brush.size, brush.erase ? 0 : brush.color);
 		}
+		redraw(pixels);
 		break;
 	case SDL_MOUSEMOTION:
 		if(brush.down) {
@@ -466,9 +459,9 @@ dokey(SDL_Event *event)
 	if(ctrl) {
 		switch(event->key.keysym.sym) {
 		/* Generic */
-		case SDLK_n: newchr(); break;
-		case SDLK_r: openchr(doc.name); break;
-		case SDLK_s: shift ? renderbmp() : savechr(); break;
+		case SDLK_n: makedoc(&doc, "untitled.chr"); break;
+		case SDLK_r: opendoc(&doc, doc.name); break;
+		case SDLK_s: shift ? savebmp() : savedoc(&doc, doc.name); break;
 		case SDLK_h: setmode(&GUIDES, !GUIDES); break;
 		}
 	} else {
@@ -483,8 +476,8 @@ dokey(SDL_Event *event)
 		case SDLK_f: setmode(&brush.mode, 3); break;
 		case SDLK_g: setmode(&brush.mode, 4); break;
 		case SDLK_b: setmode(&BIGPIXEL, !BIGPIXEL); break;
-		case SDLK_z: setrange(&brush.size, brush.size - 1, 1, 30); break;
-		case SDLK_x: setrange(&brush.size, brush.size + 1, 1, 30); break;
+		case SDLK_z: setmode(&brush.size, brush.size + (brush.size > 1 ? -1 : 0)); break;
+		case SDLK_x: setmode(&brush.size, brush.size + (brush.size < 30 ? 1 : 0)); break;
 		}
 	}
 }
@@ -527,8 +520,8 @@ main(int argc, char **argv)
 	brush.size = 10;
 	if(!init())
 		return error("Init", "Failure");
-	if(argc < 2 || !openchr(argv[1]))
-		newchr();
+	if(argc < 2 || !opendoc(&doc, argv[1]))
+		makedoc(&doc, "untitled.chr");
 	redraw(pixels);
 	while(1) {
 		int tick = SDL_GetTicks();