diff --git a/doc/tgi.sgml b/doc/tgi.sgml
index 73a0f3bbd..9f37962c3 100644
--- a/doc/tgi.sgml
+++ b/doc/tgi.sgml
@@ -41,11 +41,11 @@ of range.
 <ref id="tgi_ellipse" name="tgi_ellipse">,
 <ref id="tgi_pieslice" name="tgi_pieslice">,
 <ref id="tgi_setcolor" name="tgi_setcolor">
-<tag/Example/<verb>
+<tag/Example/<tscreen><verb>
 /* Draw the upper half of an ellipse */
 tgi_setcolor(TGI_COLOR_BLUE);
 tgi_arc (50, 50, 40, 20, 0, 180);
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>
 
@@ -66,10 +66,10 @@ be used in presence of a prototype.
 </itemize>
 <tag/Availability/cc65
 <tag/See also/Other tgi function
-<tag/Example/<verb>
+<tag/Example/<tscreen><verb>
 tgi_setcolor(TGI_COLOR_GREEN);
 tgi_bar(10, 10, 100, 60);
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>
 
@@ -93,10 +93,10 @@ be used in presence of a prototype.
 <ref id="tgi_ellipse" name="tgi_ellipse">,
 <ref id="tgi_pieslice" name="tgi_pieslice">,
 <ref id="tgi_setcolor" name="tgi_setcolor">
-<tag/Example/<verb>
+<tag/Example/<tscreen><verb>
 tgi_setcolor(TGI_COLOR_BLACK);
 tgi_circle(50, 40, 40);
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>
 
@@ -153,10 +153,10 @@ be used in presence of a prototype.
 <ref id="tgi_circle" name="tgi_circle">,
 <ref id="tgi_pieslice" name="tgi_pieslice">,
 <ref id="tgi_setcolor" name="tgi_setcolor">
-<tag/Example/<verb>
+<tag/Example/<tscreen><verb>
 tgi_setcolor(TGI_COLOR_RED);
 tgi_ellipse (50, 40, 40, 20);
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>
 
@@ -227,9 +227,9 @@ and then you change the green of the palette to blue using tgi_setpalette then
 after this painting in TGI_COLOR_GREEN will actually be blue.
 <tag/Availability/cc65
 <tag/See also/Other tgi functions
-<tag/Example/<verb>
+<tag/Example/<tscreen><verb>
 color = tgi_getcolor();
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>
 
@@ -253,7 +253,7 @@ a 256).  Or, it might rely on the fact that <tt/(unsigned char)/ will
 "wrap-around" when it is incremented beyond 255.
 <tag/Availability/cc65
 <tag/See also/Other tgi functions
-<tag/Examples/<verb>
+<tag/Examples/<tscreen><verb>
 if (tgi_getcolorcount() == 2) {
   printf("Only monochrome graphics is supported\n");
 }
@@ -269,7 +269,7 @@ if (num_colors == 0) {
 } else {
   tgi_setcolor(color % num_colors);
 }
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>
 
@@ -531,10 +531,10 @@ name="tgi_clear">/ after <tt/tgi_init/.
 </itemize>
 <tag/Availability/cc65
 <tag/See also/Other tgi functions.
-<tag/Example/<verb>
+<tag/Example/<tscreen><verb>
 tgi_install(tgi_static_stddrv); //Include the driver statically instead of loading it.
 tgi_init(); //Set up the default palette and clear the screen.
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>
 
@@ -558,10 +558,10 @@ used in presence of a prototype.
 <ref id="tgi_load_driver" name="tgi_load_driver">,
 <ref id="tgi_uninstall" name="tgi_uninstall">,
 <ref id="tgi_unload" name="tgi_unload">
-<tag/Example/<verb>
+<tag/Example/<tscreen><verb>
 tgi_install(tgi_static_stddrv); //Include the driver statically instead of loading it.
 tgi_init(); //Set up the default palette and clear the screen.
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>
 
@@ -607,7 +607,7 @@ be used in presence of a prototype.
 </itemize>
 <tag/Availability/cc65
 <tag/See also/Other tgi functions.
-<tag/Example/<verb>
+<tag/Example/<tscreen><verb>
 #define tgi_sprite(spr) tgi_ioctl(0, (void*)(spr))
 #define tgi_flip() tgi_ioctl(1, (void*)0)
 #define tgi_setbgcolor(bgcol) tgi_ioctl(2, (void*)(bgcol))
@@ -620,7 +620,7 @@ if (!tgi_busy()) {
   tgi_outttextxy(20,40,"Hello World");
   tgi_updatedisplay();
 }
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>
 
@@ -779,11 +779,11 @@ of range.
 <ref id="tgi_circle" name="tgi_circle">,
 <ref id="tgi_ellipse" name="tgi_ellipse">,
 <ref id="tgi_setcolor" name="tgi_setcolor">
-<tag/Example/<verb>
+<tag/Example/<tscreen><verb>
 /* Draw the closed upper half of an ellipse */
 tgi_setcolor(TGI_COLOR_BLUE);
 tgi_pieslice (50, 50, 40, 20, 0, 180);
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>
 
@@ -834,12 +834,12 @@ be used in presence of a prototype.
 </itemize>
 <tag/Availability/cc65
 <tag/See also/Other tgi functions.
-<tag/Example/<verb>
+<tag/Example/<tscreen><verb>
 tgi_setcolor(TGI_COLOR_BLACK);
 tgi_bar(0,0,30,30);
 tgi_setcolor(TGI_COLOR_WHITE);
 tgi_bar(10,10,20,20);
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>
 
@@ -861,7 +861,7 @@ be used in presence of a prototype.
 </itemize>
 <tag/Availability/cc65
 <tag/See also/Other tgi functions.
-<tag/Example/<verb>
+<tag/Example/<tscreen><verb>
 tgi_setdrawpage(1);
 tgi_outtextxy(10, 10, "Hello World");
 tgi_setviewpage(1); // Show page 1
@@ -869,7 +869,7 @@ tgi_setdrawpage(0);
 tgi_outtextxy(10, 10, "Creating next frame");
 ...
 tgi_setviewpage(0); // Show page 0
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>
 
@@ -973,7 +973,7 @@ be used in presence of a prototype.
 </itemize>
 <tag/Availability/cc65
 <tag/See also/Other tgi functions.
-<tag/Example/<verb>
+<tag/Example/<tscreen><verb>
 tgi_setdrawpage(1);
 tgi_outtextxy(10, 10, "Hello World");
 tgi_setviewpage(1); // Show page 1
@@ -981,7 +981,7 @@ tgi_setdrawpage(0);
 tgi_outtextxy(10, 10, "Creating next frame");
 ...
 tgi_setviewpage(0); // Show page 0
-</verb>
+</verb></tscreen>
 </descrip>
 </quote>