*pls try :*
def schemes():
table = db.schemes
links = [dict(header = T('Image'), 
 body = lambda row_field: \
DIV(A(IMG(_src = URL('default', 'download', args = row_field), _width = 
150, _height = 100), 
 _href = URL('default', 'download', args = row_field) ) if row_field else ''
)
)
]
grid = SQLFORM.grid(table, links = links)
return locals()

best regards,
stifan

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