helgasoft commented on issue #19542:
URL: https://github.com/apache/echarts/issues/19542#issuecomment-1908577002

   Actually the official Gantt example has very flexible dataZoom options set 
up.
   I've enhanced the **two** yAxis dataZooms in [Demo 
Code](https://echarts.apache.org/examples/en/editor.html?code=G4QwTgBAEgogkgcSgFQPoCUCCy4HkIC8EADAHQBsA3AFCiQAicAsqgMLYwK7oCaqcAOXowAGoRI06ERixxMYqTOnRwAapgAy4gIyTw05qjkLhABSXIAquhjiATHobZMqAFq5cLTJeS5UTXFUFZCh0XGRkDVsiAGZiR2lnNw8WEX4BAGU4YXThMSJdWn16JPdPVD5BLJzBPPEYhJLkFzKvHz8AoNQM0xgYenEyByKnZuTy719_QJMYZBhWNCUYFwB1bJD6-JGIVAATMBAAcyOQACMAGwBTBP3Dk4BLADsjmAvbg4B7AAcMgAsQHtPgB3D73I7PI6sACuYAAzp8wLgAGbIuFXAAu4gA2sQADQkAC6YOOEJeyAeAFsrhori8MX8SY8XugrgBjRF7ME_VkcsBcnaoNngDFXOEPEBPEQAIU-0KeezhOOJguFYFF4slPFl8sVytuh2B9BAGJAtxA0Ixn2Nptcn0-lMwTypJsRNAAJKQjpiABRhcKocybADUEAA5AB6PYmkARkBw9EYqMxuMPMDfREYgC0cLZfyue2h11IACsEU8wwTkfK2RiHp8nhAfYabSAAJQQADe1AguxbMfE_dNNF7lIAnqwAerSIncN86w2fT6fgvG0RKSAANZXOern1tg80AC-bZo1aetfrjY3293V_3XZ7EDAmNhje7vd7Vs-Fzr3wAXF2R54k-vaSi6q6AciIAXOiIGfhAdYYtcgEfghiFXAAHhigFhggkoYlinzIhAmBphm6oQAAYhcDxHH8GKVqBn7XMiOHhmydKimAYbMcBzHRra9qUoB2LMb2aHoYhY7fFcuFwrRexXDxBLiZ-mGYJhDxwnACpYYB-Jqb2yIPL-ylMJ8Sm4cCVxblRpncUxU
 
m9vmdEMYBdiGc5EBnJ8hEOgZ8HOXCprqoFRkQHSeweeQQVSQCCrXHAHJPP-EW9mG3wmn8_4RhGTDaGQADseLaNopAAJxQBVpAxGyWYACyVXiZAxFmAAcpDtXiTUNR1XV4jVDVsviACseIxM1NXaHinXdUNfzlXVTUVVmrWzV1jWkA1G3tVmQ2sNoNXjdo5C1aVo0UKVdikHYpXFaV5UVQAXhABWTTEeJ2L1UBnUVqh2DEfxneQAO9a973nUdFC_aQRXAFm5UNcDFCqND5DPU5zkJXs1wZA8z1yeG7XEAApFjUl5XCfwgvQmIgKZUEweian8VJknoRiMlE2GzzikpFPoQ80XhnzwtXCIgsIRpWk6XpmHhd5JlmWAFlWeGNl2Q5ylS5-IUiorzlRTFcXoc9wm4E8FnQuiqz5lcFxM7BVymwhlKfMAO5W3K6IWZ7gEYmA0JXKzruPt5XOyfJik6wSZwgGym5HGAcoKqwP6Irh3zPJuuu9mOmnabpSkKyQqneVTDvsqKeyttKCdJynur_p24C2RkXMoZ2HIXJnYYvnsYZHmzzlnEH1Md2OXc-ZyymrMLDL_ndM_8sp6e92A_79wWQ9h6OHtXFAkq41ck9dz3fcD5WEA_AnDxc_-2gj1J5sOhonyJwHQcuxFwILzlEBCp72fG5diQCIpWgAhAIqXlR5-StCJCAnlgH6zChACq40IrG0AcQWB8Vj54wJkTPB6Fqa03pozCA0FnahzUhzBCkceZiwFuXZywtcLMKuDwPOEAC6y2LvpMuEAIqoPYhg4B2DCokIQq_Skltra23to7KhzMf7eXdp7eRPsrh-yJoHYOwCNFewUVcO2VwHZf2DqzZihJTbJ3YeHUhNNgSWLUZzH4gEYFh18v5RByC1KsTAbgsOYBQEeWkT5BuydU57HXpncMABiVEyJda-VXmAeeexF4kD4qbGW2lUJqUYbhOs1JdYZnFJBcMkDdZwm-LRDEGhnhE3oSxZpZ8
 
WnpQgBfTeEBsRhgSTACq_QqJUTDISCKR5aFSRALLJpTxOneTIS4lRNCpLP0_LM7SFJP6OKkrRBZHTCneV7D03CCSKp2AqpgaUmBeLeSmessOWy4QaHOBYvZ6EzmJMudc25PDOFOzghFGCdFUocS4jraxCENl8IKZ8sCssdmblQhAZZQKrgQA2b2OpDT5ktLRc4jFWLnlzOaai9Fqz0QkrUi8t5ZwPmdkJSCYl2KICUmeIbN2szAKoCHCAUgWUwCbkhJgb4KcnikEEgK649I_i5OYuiUJYpRJ0Iig4sMyJaL0QxK2HhxSOI2wQTwl8ekwBwFFIg01SkwD4SeIRC1VxKTAL2FSOk4oGxwl5fy0gWrQFSrdU8D1QaJEXksosk5pdsQyCMMwBQSgVDqA0ASGNxhUBmAsNYGAtiuljkAjG9g8wuC8FyKIYBX57S_geFA6NhhC2cG4JUIQZaDCyDjYoZQahNApsMGmjN6ArA2AmQ8l1MZvUgCNDGX12qGJSpjNM9CrSvzc1wmyI1DoTVRWUo6q1W6wCF1ee8i4O6XWBuDV6vsE7WyCvACKl4YqJUBupEGq8cJQ0cnVku9SgFEblt4QZSZo7TTjsnaaG9wrRXiobHOsDG5vg-nPJeBsTZ75OoJM8EuHYv29hfBiN8fSMNYUJKQFKwoMQ-lQ5SU8ky2zQs_MOrFx5qCIdXM-PddqHWWp9EKkAlI30QBANnLDT4pBkauEcREY4BGYXEIJh4pBQAXGDj6AtHBi1NryNR3sUhSlXEwGAUJinZPZxI_afkPpsRyYUzBZTqb20Jq7RoNsBIxMSbAFJ-WhItMQB026umQq8MvmM_JjknILNWcU7Z3t7b-2DpgM57pJpxOSek15kcPn9Chf5BkMcSoiA8b46ZzkOW4TpaFCKMUEopQ6gVHCXEhJxBZb2CV0gmEytqg1FVmUMS6vaAa0QJrLWZOhkG7l0gf8smMifOV9UlWtQ1cVPVxrZnmtjbHO1
 
irmonjah69iPry3itrYgCNlbLXXI6vS1IeOYBaRyvELp_zIpYRXCW1mRCbr9OGZgvV9LeUIAIExIhfMEBzsMm6YiF8dSGx6itBAWVRwwfaBvo2McAnZakBE_oa7UArigOCzOIhFn8SAK83thrAAqaA8AkBoCwDgXAl39AyaILpz7DxFM_cx5AVHLOPsGfZ99_bb3se44u1zqhM6MQCGhJSBlkAiARZs1cH0MQOyhjDGGRnkA_U6ul7Lue_9xDsinBiOEvrEQbgxF6TEyAsIYl5ORnXDE9dy7bON_-WuMLYUIMxa7t2Ed_AgAAPgl6Al3BvJvHYgA1YgEAABkceIDDciTdukAfg8FBJmpAA_KH3XMu5dqVwpr8XL5awCAtzBRrtFvgO-lGOB33HwC8f4xzUumFTZ5t4abCb2S_dp4ZKbc77kU849AU-E8nuy8YlUHAUw1fq114b9XJvhw-MEjb4BDvzEu9jh7__QC_e7sRiQUP0XI-Rfj97JP0v1dbfe4GzXpfjeCut-Yu3zvgE9_MV7wAo_Aez8wlR9z8MQJ9vNcN8MOYDUwxoloRvhBY8xTIDg6RVV2YIEV1wxp8AUjgnhEQiYABCafCvMADcC4FBAEKONjcvSvMgkRTuImKzEKKeZXWjJ5NVCODA7eWsbA3Al8QCQg6uWfefBPCAfAxXJTZXBqZzERCgomafIQlBegwCRg-gn0JlZWZRAZPYPYM4OIM4MMLFVg9CNlL9aArA4BMFPA_g6fe_DEcgwTOQu_O3RQ5g5QkzJg64NQrpDQkpQ4INIVLiHhHFQOT4bcXwyUOpNue1IIr3diUUbCP9eIjEeyC4TQpJVEe5ZyE8OjXsBjI8JjFjK8NjM1A9elB2HdVfFvAkOTYTbTfQHnATEzJrInaokzSLZXYgNsUnPrdLB4EiH0VHAAHggFfyK2yyO1DFGlqM_AgLACeHS0eTY0C3fGYmgNgPgNNgqXvivFEiAV4RzQQkQIuGQPB
 
TEjQI4MoMymyh4WpgcOORORFjDCYHxFjw0HxCzE8ggA0DiDxA-Nj1YAajuj-IgBiG6kRggFGneKRw0C8XBJhJeIgFcBiNLgiQQi7z-L_V_0AgqlRM_GH3Yn8ROThxADHDlHYjDA5E9h4kAzoNcIRXQh8MSRiHIHajZHIDZEyPWQXQQlMM4KSJuKUPpOlg8h2lzR_U-i6SSLcPk3aJ9G0GkKJKSNUGUjrGFAuEwG1XBTDB8WNUSLtw1LBVXUhRUklLtxSLSOSU5OMO5M_F5MuP5JcJQiFO_WgUwSJPRLulNOwmVPVAeDVINJwNwh1I3T1OwgDK1M4ntVji9PYnEOUzsAVJOSSPNPOVwWICtJhRyIgDyIKJrFYzZCf2rnrxf2b3XyoIxGmNmMbGNxFDN2TkEz-D9JI0LNrGLJX2nw33f0AlGNGzN23zRO7NLLN17NIG_wQixJGKHLGNWzN1_0AJ1UHLX2HNOzG3xLAOPCAA).
 The red slider only moves up & down. The pink dataZoom is the aperture(width) 
of the red slider. Using both can customize the vertical resolution to your 
liking.
   
   
https://github.com/apache/echarts/assets/13038071/190e51f9-443d-48a1-a13e-8c261a95d77a
   
   📌 please close issue if problem solved.
   


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