Tags:
List of general tags for all schemes and special tags for certain schemes.

GENERAL:
<!-THUMBHEIGT->
target height of the thumbnails
<!-THUMBWIDTH->
target width of the thumbnails
<!-IMAGEHEIGHT->
max. image height 
<!-IMAGEWIDTH->
max. image width
<!-ROWCOUNT->
number of rows
<!-COLCOUNT->
number of columns
<!-THUMBCOUNT->
number of thumbnails/images
<!-NAVIGATION->
add navigation code
<!-MAINDIR->
relative URL of the main HTML directory
<!-IMAGEDIR->
relative URL of the image directory

GENERAL - ARITHMETIC:
OP1 and OP2 can be anything, e.g other arithmetic terms or numbers,
e.g. <!-MUL-><!-2-><!-<!-SIZE->-><!-/->.
<!-ADD-><!-OP1-><!-OP2-><!-/->
add OP2 to OP1
<!-SUB-><!-OP1-><!-OP2-><!-/->
subtract OP2 from OP1
<!-MUL-><!-OP1><!-OP2-><!-/->
 OP1 * OP2
<!-DIV-><!-OP1-><!-OP2-><!-/->
 OP1 / OP2

THUMBNAIL SCHEME:
<!-THUMB-> 
Inserts the thumbnail code here, this tag must be used!
<!-HINT->
Inserts hint here.
<!-DESCRIPTION->
Inserts description here.
<!-SIZE->
Inserts size of the image here.
<!-SIZEKB->
Inserts size of the image in kB here.
<!-NAME->
Inserts name of the image here.
<!-NAMEUS->
Inserts name of the image with all underscores removed here.
<!-NUMBER->
Inserts number of the image here.
<!-DATE->
Inserts date the image was created here.
<!-IMAGEURL->
Inserts the relative URL of the image. 
<!-THUMBURL->
Inserts the relative URL of the thumbnail
<!-OTHERLINKURL->
Inserts the URL specified in the corresponding advanced image option

IMAGE SCHEME:
almost all  image scheme tags can also be used in the image HTML file

<!-IMAGE->
Inserts the image code here, this tag must be used!
<!-HINT->
Inserts hint here.
<!-DESCRIPTION->
Inserts description here.
<!-SIZE->
Inserts size of the image here.
<!-SIZEKB->
Inserts size of the image in kB here.
<!-NAME->
Inserts name of the image here.
<!-NAMEUS->
Inserts name of the image with all underscores removed here.
<!-NUMBER->
Inserts number of the image here.
<!-DATE->
Inserts date the image was created here.
<!-BACKTOGALLERY->
URL of Gallery
<!-NEXT->
URL of next image or image HTML
<!-PREVIOUS->
URL of previous image or image HTML.
<!-NEXTNAME->
name of next image
<!-PREVIOUSNAME->
name of previous image
<!-IMAGEURL->
Inserts the relative URL of the image. 
<!-THUMBURL->
Inserts the relative URL of the thumbnail
<!-OTHERLINKURL->
Inserts the URL specified in the corresponding advanced image option

NAVIGATION SCHEME:
The conditional IF statements have to be closed with the ENDIF statement. 
The expression in between will be evaluated if the condition is true, e.g. the image or gallery with the given number exists. Otherwise it will be deleted. All tags of the expression  will be evaluated for the image or gallery with the given number. Usually you will use the tags <!-LINK-> for linking to the file with the given number and <!-NAME-> for its name.
In image files the navigation is navigation between images, in the galleriy files it is between the galleries.
<!-IFNEXT->
if a next image or gallery exists, then add the code between <!-IFNEXT-> and <!-ENDIF->
<!-IFPREVIOUS->
if a previous image or gallery exists, then add the code between <!-IFPREVIOUS-> and <!-ENDIF->
<!-IFINDEX->
Adds the code between <!-IFINDEX-> and <!-ENDIF-> for all images or galleries.
<!-IFINDEX=<number>->
if an image or gallery with number=<number> exists, then add the code
<!-IFINDEX+<number>->
if an image or gallery with number=currentnumber+<number> exists, then add the code 
<!-IFINDEX-<number>->
if an image or gallery with number=currentnumber-<number> exists, then add the code 
<!-ENDIF->
end of a conditional statement
<!-LINK->
Link to current file (inside an IF-statement it's the link to the file with the index given in the IF-statement)
<!-NAME->
Name of current file (inside an IF-statement it's the name of the file with the index given in the IF-statement)
<!-PREVIOUS->
URL of previous file
<!-PREVIOUSNAME->
Name of previous file
<!-NEXT->
URL of next file
<!-NEXTNAME->
Name of next file

GALLERY SCHEME:
<!-GALLERY->
Inserts the gallery code here, this tag must be in it.
<!-NAVIGATION-> 
should be used here to add the navigation code.