Cesis comes with a theme panel that will let you modify anything you want without having to code or modify anything from the theme.

[cesis_line_divider width="100" color="#000000" use_icon="yes" icon="fa-camera2" i_size="25" i_color="#000000" margin_top="20" margin_bottom="60" icon_color="#000000"][cesis_portfolio style_ig="cesis_portfolio_style_3" hover="cesis_hover_overlay" hover_color="rgba(45,45,45,0.58)" effect="cesis_effect_zoomIn" force_font="custom" heading_font="custom" h_google_fonts="font_family:Roboto%3A100%2C100italic%2C300%2C300italic%2Cregular%2Citalic%2C500%2C500italic%2C700%2C700italic%2C900%2C900italic|font_style:500%20bold%20regular%3A500%3Anormal" h_f_size="18px" h_l_height="21px" h_t_transform="none" thumbnail_size="tn_rectangle_4_3" to_show="8" category="all" tag="all" col="4" m_h_color="#424242"]
[cesis_line_divider height="1" width="1620" color="#e3e3e3"]