Tell me if you prefer the attached help_index.png
using this setting
PathCombine(gP.mt.FullName, HelpFolder(), L"help_index.png");
HBITMAP hBitmap = ZI_CreateBitmapFromFile(gP.mt.FullName, w, h);
if (hBitmap) {
nID = IDT_HELPLOGO;
x = (288 - w) / 2;
y = ClientH - 8 - h;
ZD_DrawBitmapToCtrl(hTopic, x, y, hBitmap, ZD_ColorARGB(128, 0), nID, ZS_VISIBLE);
ZD_SetObjectAnchorMode(nID, ANCHOR_BOTTOM);
ZD_SetObjectHidden(nID, ZS_INACTIVE);
}